Outbound Proxy - No XML message seen !!!!!!!!!!

Hi All

I am trying to use outbound ABAP proxy from an R/3 system . I have written a Z program to triger the execute_asynchronous method of the proxy generated. Now when i go to see the SXMB_MONI txn to see any XML message flow i dont see anything .

Any pointers so to what need to be perfect to see a XML message is the monitor for an outbound proxy??