Hello,
To be honest, it's really too old, I don't remember how we solved this, and even what was exactly the issue... I see you have issue in a BAPI call, did you generate correctly the request ?
I usually do this using a tracer to show the request XML, and copy it into a local XML. So using a tracer and link the 'BAPI_PRODORDCONF_CREATE_TT.Request' to the message... You have also to click on "generate sample" I think (in the BAPI call action block)
Hope it will help you.
Regards
Olivier