Trouble syncing with Windows Mobile Device Center

[bumblefreak]

I have two laptops. I can sync with the Windows XP laptop with no problem, however, I can't sync with the Vista computer at all. I've even tried reformatting the Vista laptop, but can't get it to sync. I've tried uninstalling the driver for the connection through the Device Manager as well as the Windows Mobile Device Center. Then reinstalling Windows Mobile Device Center and the driver. I've checked the cable and USB port. They work for everything else I can throw at them, but can't get them to sync. Windows Mobile Device Center does not show any devices connected. Any advice?

Laptop 1
Windows XP SP3
Activesync version 4.5
Microsoft Outlook 2007

Laptop 2
Windows Vista Home Premium SP1
Windows Mobile Device Center
Outlook 2007

Cell phone
AT&T Tilt
Windows Mobile version 6.1