MM SUS ENTRY SHEETS NO SEND

HI.  Masters.   I need help to send ML81n entry sheet from PO of service to SUS

My scenary

We are on SRM7,02 & EHP5.

we are trying to send Entries accepted on ML81N for PO of services .   but ECC 6.0 doesn´t executes the Proxy to send interface ServiceAcknowledgementERPCreateRequest_Out to send to SUS .  

what settings are necessary to send that interface to XI-SUS.

thanks in advance.