Greetings madman_nyc! Welcome to the Windows Mobile forums! Would you by chance happen to have installed the 32-bit version of WMDC? If so, please uninstall it and install the 64-bit version of WMDC from the bottom of the screen on the hyperlink shown below. It will show a mix of 32bit and 64bit, so...

Since 6 Month I and thousand other Vista x64 User have the same Problem, the the Device is reconized only one time, it syncs and than never again over USB. Ober bluetooth no problem. But Google the Problem, under WMDC Vista x64 and "USB Device not installed" I think this will be a Start for...