TP2 Suddenly isn't detected by Activesync 4.5 on XP

[cruiserandmax]

I'm having a weird problem where I'm connecting my TP2 via USB to my XP machine and activesync (4.5) doesn't connect to the phone. I'm sure it's not the cable, as I've tried the cable that came with the my original Touch and ToouchPro with the same results. What's really strange is Windows sees the phone just fine as a USB drive (I can see the file structure on the phone fine through explorer). However I need activesync to be able to actually sync all of the new contacts that I've added on my phone since I last sync'd it with the PC (which was in March of last year!)..

It's possible that the last time it was sync'd it had WM 6.1.. The phone has WM 6.5 (stock Sprint) now..

I have no idea what's going on... any ideas?