Okay, well, the good news is that the BIOS should be plenty up to date (none of the updates seem to relate to this problem). You may, however, still want to check if you've got the most up-to-date chipset driver (
GIGABYTE - Support - Motherboard - Driver - GA-P35C-DS3R (rev. 1.x)). This can actually solve some problems of this sort.
Another thing to check is if you get different behavior in different USB ports (especially on the mainboard versus remote ports). Ensure that you have it plugged into a USB 2.0 slot (shouldn't be a problem, I don't think).
And, though it may have ranked first, go ahead and download the drivers from the Cyber Snipa website. Sometimes they update things without really announcing it. Reinstalling with those drivers might help (if you've already done that, you can probably ignore this).
Checking your BIOS settings may also lend a bit of a clue. I assume you built your computer (I haven't seent many setups like that that weren't home built), so you may be comfortable looking in the BIOS to see if there are any USB settings or detection settings that might be conflicting.
If none of these give you any results, please open up your device manager and look around and see where the keyboard is. Take a look at as many details of that as possible, and share with screenshots, if possible.