Can't get T-Mobile MDA to Sync with Vista

I have a T-Mobile MDA that worked perfect with Active Sync on XP.
However, when I upgraded to Vista, it stopped working. Of course I
uninstalled Active Sync and am using the new Windows Mobile
application. Blue tooth connects and authenticates, but then Vista
says it is installing a driver for the device and then says it failed.
Windows Mobile on Vista then times out. There are no events logged. i
have uninstalled the Windows Mobile on Vista and reinstalled it just
to be sure of the latest version. Any help would be appreciated.


Glen