USB gaming keyboard not working, any help?

[PlymouthJoseph]

Okay, I have a Mad Catz V.7 Gaming keyboard which for some unknown reason has decided to stop working. I don't know how and I don't know why. 

When it is plugged in, I try and type into anything and it will just refuse to type... The thing is though, it still is illuminated and the Num-Lock key is illuminated. But, luckily enough, I have a spare, unused PS2 keyboard just in case of these mishaps. My PS2 keyboard works no problem, but the weird thing is, even with V.7 still plugged in, I can press the Num-Lock button and it will toggle it off, and it does the same on my V.7. It also goes off, but when I try it on the V.7, it doesn't work? I also have the software and I have some the macro keys set, and when I select a profile and try it, it still doesn't work.

But don't thing that the computer isn't just simply not picking it up because I can still use the media bar at the top (Volume up/down, mute, play/pause, previous and next) and they all work. I can also still use that though panel to turn off the back-light and change the colours and everything. it is just like, the whole "Keyboard" part of the keyboard isn't working. 

I don't know how it happened. Last night I was using it no problem but now it is simply not working. The USB pass-though still works, along with the audio jack and the microphone.

I have even tried plugging it into my brother laptop because I used it on his when I has to do some work and my computer was doing a update. Didn't work on this either.

Do you have any idea? I really don't want to be stuck with this REALLY old PS2 keyboard. My Grandad first owned this keyboard when he bought a PC with Windows 95 on it. I still actually have that PC somewhere in the attic. lol.

Hope for a quick reply, because I currently cannot afford another keyboard due to the cooker and fridge going on the exact same day. 

Many thanks

- Joe

-------------------- EXTRA INFORMATION --------------------

I have just changed the USB ports and I defiantly know it is working now because It has just installed the drivers for the keyboard. But when I try and boot into the BIOS, it won't let me... I can keep pressing "Delete" but it still refuses to work. But yet, when I do it with the PS2 keyboard, it works no problem.