Daniel is right, but more specifically to the problem, this is caused by a conflict with bluetooth devices (i.e keyboard, mouse). Disable the bluetooth and use a plug in or RF keyb/mouse and you will be able to sync. Painfully annoying.

URC should address this issue, I know I have called and told them. Thankfully, alot of us have laptops in the field, but nonetheless, a very annoying problem.

Vincent