MDN Disposition-modifier-extension is error: MDN authentication-failed

Dear All,

I am facing an issue with AS2 receiver Communication Channel.

We have two PI systems like one internal(PI2) and other one is external(P93).

The scenario is like this we are sending the PO creation to legacy system (R/3 System to legacy system (IDOC-->PI2 -- P93-->AS2)).

When i sent the IDOC from R/3 system its successfully sent through PI2 but in P93 it's failing with the status General error. When i checked the receiver Communication Channel its in error the status is MDN Disposition-modifier-extension is error: MDN authentication-failed.

I could not see any user name and password in the CC when i am configuring.

Please find attached screen shots for more information.

Thanks in Advance...

Regards,

Raghu.