sender AS2 to idoc receiver

hi

i am doing sender as2 to idoc receiver scenario using B2B add on.

i have mendelson as2 software.

when i send data from mendelson i am getting error -

i have created as2 sender channel and iflow is generated for it using as2 sender and idoc receiver channels.

but message is not going out from mendelson as2 software and stuck with error - can not deliver message to moduleprocessor. any idea on it.