I have a Panasonic PV-GS150 camcorder. According to the manual I should be able to transfer the video to my PC with the enclosed USB cable and drivers. When I go to install the drivers, it says I already have a standard USB driver and will not install. I have Windows XP SP2. I've tried downloading another driver from the Panasonic website but that still didn't work. I cannot get my PC to recognize my camcorder. Any suggestions?