I recently bought the Asus P5AD2 Premium Motherboard with other peripherals for my new PC which is working fine. I have a CASIO PV-S1600 Pocket Viewer (Pocket PC) When I connect the PV to the USB Port using the supplied CASIO USB Cable and start the File Transfer Manager or PC Sync the Windows XP gives me a message in balloon at System Tray that "USB Device Not Recognized" "One of the USB devices attached to this computer has malfunctioned, and windows does not recognize it. For assistance in solving this problem, click this message." Clicking on this message open a window with a tree, Code: ---USB Root Hub (2 Ports) +-Unknown Device +-Unused port I have tried all the ports available on the motherboard. But the same error message. Code: My Hardware config: Intel Pentium-4 3.4 GHz (Prescott) Asus P5AD2 Premium Motherboard. 512 MB DDR-II @ 533 MHz Geforce PCX 5750 with 256 MB DDR. Segate 120 GB SATA @ 7200 RPM Windows XP with SP-1. Please help me. Kannan.