don't take this the wrong way, cuz i hate done this several times myself. when you open active sync (i assume ur running xp) in the file tap on the top there is a box that must be checked that says "allow usb connections". on my comp it periodicly unchecks itself. Also new to 6.1 there is a box under the connections tab in settings that says the same thing on your ppc.
sorry if i am waisting your time and myown, just trying to help.
