Not able to fetch workitem from Multiple system ( version 4.6c ) in POWL Configuration

Hi Experts,

i am configuring SAP POWL in my EHP 6 System and i am able to get work-items from same system but i am not able to get from multiple system which version is 4.6c.below steps are already done.

1.Create RFC Destination ( destination working fine )

2.in SPRO,Cross-Application Components ->Processes and Tools for Enterprise Applications -> Inbox -> Assign Connected Back-End Systems to Inbox

     Added Destination for Old system 4.6c

3.Create Exception Entry for that

4.Business function FND_IBO_MULTIBE_1 activated

5.Assigned below roles to respective users

SAP_BC_BMT_WFM_INB_API_END_USR

SAP_BC_BMT_WFM_INB_API_SRV_USR

6.Added respective Task IDs in SPRO -> inbox- >Assign Task IDs to POWL Types

Please help if i any config are missing.

Regards,

Pramod Gupta.