From what I've found in the past...if it will sync and disconnect...then you might try chaning your settings in Control Panel/System/Hardware/Device Manager....depending on which Window version you are using.
Either way you need to find the device manager. Select the USB Root Hub and go to power management. Uncheck "Allow the computer to turn off this device to save power".
I have this option in Window XP and this corrected my problem of continual disconnects. Now my sync works fine every time, all the time and never disconnects.
Hope this helps!
Dalmute
