I have been using MPE under windows 2000 for a year I it has worked very fine. Now I'm using Vista Enterprise, and MPE hangs after a while. I have not found out exactly when. When hanged, it can not be killed via Task Manager. The MPE process does not stop. I have to log out and in again and restart it.
I really liked MPE, so I hope I will be able to use it again soon.
OK, then try to use another Bluetoothdriver or Stack. If this is not possible then deactivate "Automatic connectiondetection" in the settings of MyPhoneExplorer.