Handling multiple EDI transaction

Hi,

We are getting multiple EDI transactions (940, 850 etc) from our customer. I have defined one Sender Agreement with service interface as functional acknowledgment and one each for EDI transactions (with service interface 940 and service interface 850 etc) in the same configuration scenario.

There wil be only one communication channel to receive all the EDI files. My problem is whenever I send the EDI 850 transaction it is taking the service interface of 940. Because of that it is executing the 940 interface map instead of 850!!!

Am I doing any wrong in my configuration? When I test the data in test tab of configuration scenario, it is taking the correct service interface, but it is not happening in the run time... I cleared the cache also.. still no luck...

Can someone please help me in this? Please guide me if I am doing any wrong.

Regards,

Vas