[*king*]

i dont personally have a 64 bit machine but this was posted in the TP2 forums

For windows 7/ 64bit and windows mobile device center issues

1) make sure you have admin access...

2) Go Start menu

3) Type "Services.msc" and hit enter

4) There are 2 services that begin with "Windows Mobile" right click them and restart them, one at a time.

5) Usually, the 1st one, "Windows Mobile-2003-basked device connectivity" has to be killed from the task manager.