Broken SOAP envelope - Contact Person not created in ABAP end

Hello Experts,

I have configured RFx scenario in SRM  7.0 sandbox system.

I am able to create Bidder contact person from portal using existing SU01 id, however, when I try to create contact person directly (w/o SU01 id), the system does not create user in ABAP end. The user is created in portal & mail also triggered.

I get warning stating "SPML Service returned the broken SOAP envelope" & consequently the bidder contact person is not able to access the portal link. I have attached the error screenshot.

I have done all settings as per http://help.sap.com/SCENARIOS_BUS2008/helpdata/EN/8b/7572994153477e9486f4e88ad45d36/content.htm

I am not a core technical person, hence can someone give any pointers/documents/links on how to troubleshoot this ?

Your help is appreciated. Thanks.

BR,

PD.