You didn't reveal the make, model of the phone and since this is the iPhones and iPods forum you may want to add a little more detail.
My Pharos m619 appears to have a failed USB port. My other Windows Mobile phones are fine so I know it's the m618 at fault. So it's off to them to repair.
I downloaded the windows mobile device center 6.1 version and I got it worked once. I unisntalled and re-installed it because of hanginag problem. Now eversince, evertime I connect my mobile to my pc the program always says not connected. How would I be able to retrieve the connection between my mobile and my pc again.