DirectPLayMessageHandler

Does anyone have a working (simple) example of how the DPMH is used? I would like to test my system with a known working example.Why I'm asking:I have the source code for connection to a multiplayer session using DirectPlay. However, while all the functions are returning S_OK, no message is ever received in the DPMH function. This was working until a few weeks ago when suddenly no MP session is *ever* found (requires a DPN_MSGID_ENUM_HOSTS_RESPONSE). What bothers me is that FSInn and SBRelay both continue to perform ok. Why this should suddenly stop working is beyond me, especially considering that FSInn works fine.Senior Captain, Pier Glass Aviation