SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934


         Date of Report (Date of earliest event reported) July 28, 2006

RESIDENTIAL  FUNDING MORTGAGE SECURITIES II, INC. (as depositor under an Amended
and Restated Trust  Agreement,  dated as of July 28, 2006, and pursuant to which
an Indenture was entered into,  providing  for, inter alia, the issuance of Home
Equity Loan-Backed Term Notes, Series 2006-HSA4)


                Residential Funding Mortgage Securities II, Inc.
--------------------------------------------------------------------------------
             (Exact name of registrant as specified in its charter)

         DELAWARE                 333-131196-04             41-1808858
         --------                 -------------             ----------
(State or Other Jurisdiction      (Commission            (I.R.S. Employer
of Incorporation)                 File Number)           Identification No.)

       8400 Normandale Lake Blvd., Suite 250, Minneapolis, Minnesota 55437
               (Address of Principal Executive Offices)            (Zip Code)

      Registrant's telephone number, including area code, is (952) 857-7000
                                       N/A
             (Former name or address, if changed since last report)

Check  the  appropriate  box  below  if the  Form  8-K  filing  is  intended  to
simultaneously  satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

[ ] Written communication  pursuant to Rule 425 under the Securities Act (17 CFR
230.425)

[ ] Soliciting  material  pursuant to Rule 14a-12 under the Exchange Act (17 CFR
240.14a-12)

[ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
Act (17 CFR 240.14d-2(b))

[ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
Act (17 CFR 240.13e-4(c))



<PAGE>


Item 8. Other Events.


On July 28, 2006,  Residential  Funding Mortgage  Securities II, Inc. caused the
issuance and sale of the Home Equity  Loan-Backed Term Notes,  Series 2006-HSA4,
pursuant to an  Indenture,  dated as of July 28, 2006,  between Home Equity Loan
Trust 2006-HSA4, as issuer and JPMorgan Chase Bank, N.A., as indenture trustee.

Item 9. Financial Statements, Pro Forma Financial Information and Exhibits.

               (a) Not applicable

               (b) Not applicable

               (c) Not applicable

               (d) Exhibits (executed copies): The following execution copies of
Exhibits to the Form S-3  Registration  Statement of the  Registrant  are hereby
filed:

        4.3  Servicing  Agreement  dated as of July 28,  2006 among  Residential
        Funding Corporation,  as master servicer,  JPMorgan Chase Bank, N.A., as
        indenture trustee, and the Home Equity Loan Trust 2006-HSA4, as issuer.

        4.4  Amended  and  Restated  Trust  Agreement  dated as of July 28, 2006
        between  Residential Funding Mortgage Securities II, Inc., as depositor,
        and Wilmington Trust Company, as owner trustee.

        4.5  Indenture  dated as of July 28, 2006 between Home Equity Loan Trust
        2006-HSA4,  as issuer,  and  JPMorgan  Chase Bank,  N.A.,  as  indenture
        trustee, and Appendix A thereto.

        10.1 Home Equity Loan  Purchase  Agreement  dated as of July 28, 2006 by
        Residential  Funding  Mortgage  Securities  II, Inc., as purchaser,  and
        Residential Funding Corporation, as seller.

        10.2  Financial  Guaranty  Insurance  Policy  issued  by MBIA  Insurance
        Corporation  relating to Home Equity Loan-Backed Notes, Series 2006-HSA4
        relating to Notes.

        99.1   Home Equity Loan Schedule.



<PAGE>


                                   SIGNATURES

               Pursuant to the  requirements  of the Securities  Exchange Act of
1934,  the  registrant has duly caused this report to be signed on its behalf by
the undersigned thereunto duly authorized.

                                RESIDENTIAL FUNDING MORTGAGE SECURITIES II, INC.


                                 By:           /s/ Heather Anderson
                                        ------------------------------------
                                        Name:  Heather Anderson
                                        Title: Vice President


Dated:  July 28, 2006



<PAGE>


                                  EXHIBIT INDEX


EXHIBIT NUMBER        DESCRIPTION

4.3  Servicing  Agreement  dated as of July 28, 2006 among  Residential  Funding
     Corporation,  as master  servicer,  JPMorgan Chase Bank, N.A., as indenture
     trustee, and the Home Equity Loan Trust 2006-HSA4, as issuer.

4.4  Amended and  Restated  Trust  Agreement  dated as of July 28, 2006  between
     Residential  Funding  Mortgage  Securities  II,  Inc.,  as  depositor,  and
     Wilmington Trust Company, as owner trustee.

4.5  Indenture  dated  as of July  28,  2006  between  Home  Equity  Loan  Trust
     2006-HSA4,  as issuer, and JPMorgan Chase Bank, N.A., as indenture trustee,
     and Appendix A thereto.

10.1 Home  Equity  Loan  Purchase  Agreement  dated  as  of  July  28,  2006  by
     Residential  Funding  Mortgage  Securities  II,  Inc.,  as  purchaser,  and
     Residential Funding Corporation, as seller.

10.2 Financial  Guaranty  Insurance Policy issued by MBIA Insurance  Corporation
     relating to Home Equity Loan-Backed Notes, Series 2006-HSA4 relating to the
     Notes.

99.1 Home Equity Loan Schedule.





<PAGE>
[{"type": "8-K", "sequence": "1", "filename": "hsa48kod.txt", "secsgml_size_bytes": 5771}]
{"company-data": {"conformed-name": "Home Equity Loan Trust 2006-HSA4", "cik": "0001369504", "assigned-sic": "6189", "irs-number": "411808858", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "333-131196-04", "film-number": "061023441"}, "business-address": {"street1": "8400 NORMANDALE LAKE BLVD", "street2": "SUITE 600", "city": "MINNEAPOLIS", "state": "MN", "zip": "55437", "phone": "9528327000"}, "mail-address": {"street1": "8400 NORMANDALE LAKE BLVD", "city": "MINNEAPOLIS", "state": "MN", "zip": "55437"}, "former-company": {"former-conformed-name": "Home Equity Trust 2006-HSA4", "date-changed": "20060719"}}
SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934

         Date of Report (Date of earliest event reported) July 28, 2006

RESIDENTIAL  FUNDING MORTGAGE SECURITIES II, INC. (as depositor under an Amended
and Restated Trust  Agreement,  dated as of July 28, 2006, and pursuant to which
an Indenture was entered into,  providing  for, inter alia, the issuance of Home
Equity Loan-Backed Term Notes, Series 2006-HSA4)

                Residential Funding Mortgage Securities II, Inc.
--------------------------------------------------------------------------------
             (Exact name of registrant as specified in its charter)

         DELAWARE                 333-131196-04             41-1808858
         --------                 -------------             ----------
(State or Other Jurisdiction      (Commission            (I.R.S. Employer
of Incorporation)                 File Number)           Identification No.)

       8400 Normandale Lake Blvd., Suite 250, Minneapolis, Minnesota 55437
               (Address of Principal Executive Offices)            (Zip Code)

      Registrant's telephone number, including area code, is (952) 857-7000
                                       N/A
             (Former name or address, if changed since last report)

Check  the  appropriate  box  below  if the  Form  8-K  filing  is  intended  to
simultaneously  satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

[ ] Written communication  pursuant to Rule 425 under the Securities Act (17 CFR
230.425)

[ ] Soliciting  material  pursuant to Rule 14a-12 under the Exchange Act (17 CFR
240.14a-12)

[ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
Act (17 CFR 240.14d-2(b))

[ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
Act (17 CFR 240.13e-4(c))
Item 8. Other Events.

On July 28, 2006,  Residential  Funding Mortgage  Securities II, Inc. caused the
issuance and sale of the Home Equity  Loan-Backed Term Notes,  Series 2006-HSA4,
pursuant to an  Indenture,  dated as of July 28, 2006,  between Home Equity Loan
Trust 2006-HSA4, as issuer and JPMorgan Chase Bank, N.A., as indenture trustee.

Item 9. Financial Statements, Pro Forma Financial Information and Exhibits.

               (a) Not applicable

               (b) Not applicable

               (c) Not applicable

               (d) Exhibits (executed copies): The following execution copies of
Exhibits to the Form S-3  Registration  Statement of the  Registrant  are hereby
filed:

        4.3  Servicing  Agreement  dated as of July 28,  2006 among  Residential
        Funding Corporation,  as master servicer,  JPMorgan Chase Bank, N.A., as
        indenture trustee, and the Home Equity Loan Trust 2006-HSA4, as issuer.

        4.4  Amended  and  Restated  Trust  Agreement  dated as of July 28, 2006
        between  Residential Funding Mortgage Securities II, Inc., as depositor,
        and Wilmington Trust Company, as owner trustee.

        4.5  Indenture  dated as of July 28, 2006 between Home Equity Loan Trust
        2006-HSA4,  as issuer,  and  JPMorgan  Chase Bank,  N.A.,  as  indenture
        trustee, and Appendix A thereto.

        10.1 Home Equity Loan  Purchase  Agreement  dated as of July 28, 2006 by
        Residential  Funding  Mortgage  Securities  II, Inc., as purchaser,  and
        Residential Funding Corporation, as seller.

        10.2  Financial  Guaranty  Insurance  Policy  issued  by MBIA  Insurance
        Corporation  relating to Home Equity Loan-Backed Notes, Series 2006-HSA4
        relating to Notes.

        99.1   Home Equity Loan Schedule.
SIGNATURES

               Pursuant to the  requirements  of the Securities  Exchange Act of
1934,  the  registrant has duly caused this report to be signed on its behalf by
the undersigned thereunto duly authorized.

                                RESIDENTIAL FUNDING MORTGAGE SECURITIES II, INC.

                                 By:           /s/ Heather Anderson
                                        ------------------------------------
                                        Name:  Heather Anderson
                                        Title: Vice President

Dated:  July 28, 2006
EXHIBIT INDEX

EXHIBIT NUMBER        DESCRIPTION

4.3  Servicing  Agreement  dated as of July 28, 2006 among  Residential  Funding
     Corporation,  as master  servicer,  JPMorgan Chase Bank, N.A., as indenture
     trustee, and the Home Equity Loan Trust 2006-HSA4, as issuer.

4.4  Amended and  Restated  Trust  Agreement  dated as of July 28, 2006  between
     Residential  Funding  Mortgage  Securities  II,  Inc.,  as  depositor,  and
     Wilmington Trust Company, as owner trustee.

4.5  Indenture  dated  as of July  28,  2006  between  Home  Equity  Loan  Trust
     2006-HSA4,  as issuer, and JPMorgan Chase Bank, N.A., as indenture trustee,
     and Appendix A thereto.

10.1 Home  Equity  Loan  Purchase  Agreement  dated  as  of  July  28,  2006  by
     Residential  Funding  Mortgage  Securities  II,  Inc.,  as  purchaser,  and
     Residential Funding Corporation, as seller.

10.2 Financial  Guaranty  Insurance Policy issued by MBIA Insurance  Corporation
     relating to Home Equity Loan-Backed Notes, Series 2006-HSA4 relating to the
     Notes.

99.1 Home Equity Loan Schedule.