Have recently bought the above. Inserted into computer all seemed ok recognised card and all seems correct in device manager. However If I plug a usb device (any) into the ports it comes up as unknown device and no matter what I do it will not recognise any drivers. When I plug the devices into my onboard USB 1 they are recognised ok. Xppro plenty of ram intel etc. AS i say all works on my built in USB just not recognised in the PCI. Have tried reseating the card but no go
Your problem is with the card. I've had 2 of these useless cards which have both failed within months.I suggest you send it back and purchase a different make. I have found that the more expensive cards always work eg Belkin - there are other makes.