If anyone has a Belkin dongle, using the Widcomm stack, they may have some issues. Here's what I've found so far.
Stack doesn't always initiate when inserting the dongle
Stack sometimes crashes when removing the dongle
Stack sometimes crashes when re-inserting the dongle
Stack sometimes stops working, or loses track of the dongle
Here's the trick/key:
It doesn't seem to be anything to do with MPE
You can manually restart a badly behaving stack without rebooting MPE, or the computer
Sometimes you must 'connect' to the phone (F1) before you can synch anything
There were also a batch of bad Belkin dongles in either 2005 or 2006. Any that have a serial number ending in -5I might fail to work at all. I happen to have one of the bad ones, contacted Belkin via their website, got a replacement for free :)