Error Messages Logging On

Once I'm in the aircraft on the ground, I go to Flights then Multiplayer and then Connect. Sometimes I actually get to go to the next screen, but sometime before it gets to the "Click Here to Join the Action" page, I get a Microsoft error and MSFS shuts down. Typically things are pretty messed up from that point and a restart is required. My system is stable otherwise and this is the only problem I have with MSFS. My system is PIII 933 running ME. Does anyone know what to look for or some things to try so I can solve the problem? Thanks.-Boyd Barker WestWind Airlines BOS Hub Manager