Windows mobile device center not syncing with motorola q

[j5485]

HiI have installed windows mobile device center several times on my vista home premium computer. I used to have my moto q sync with my old xp pro computer via MS Active Sync 4.5 with no problem. I have been struggling to make my WDMC see my moto q phone. Sometimes, I can see the name of the moto q phone in wdmc but it justs hangs on "Connecting". It doesn't go further than that. That is, there is no partnership established.When I go into device manager, I see a "Windows mobile device" and I click on properties. It says " This device cannot start (code 10).". WHen I try the sync center in vista, it does not even recognize the existence of the phone. I have installed usb support for vista (I think the url for that was http://support.microsoft.com/kb/941600 ) but nothing works. There is nothing wrong with the usb cable.Any suggestions? I do have zonealarm and avast antivirus but I doubt that is the problem because activesync on my xp pro had no problems.ThanksC