Help Froyo Updating questions

[bluecole]

I tried updating to 2.2, but i got the "not connected to USB" error. Tried setting it as a disk drive, and sync.

Tried from different ports, and even tried the HTC sync, and it won't connect to that, either.

But my computer recognizes it as a drive, so i can pull off and put stuff on.

Any ideas?

Also, on a related note, my wife's screen busted. How hard was it to get tmobile to replace it?

Thanks,
B.