Dear Sridhar
Are you using the Seeburger add-on or SAP's own B2B add-on?
If you are using SAP's own B2B add-on, you should check out the B2B space instead B2B Integration with SAP NetWeaver Process Orchestration
There are some Learning Series document in that space. For example, the below is for the EDI Separator Adaptor.
http://scn.sap.com/docs/DOC-28948
Rgds
Eng Swee