Sound isn't working anymore...

So, I had an old out of date sound card for my PC, and I finally got a new one. After I got this new one my sound worked, and my microphone also worked, for my headset. Today I decided to move my computer into the basement for my own use, and once I get down there I connect everything and it is all good, until I realize my sound isn't working. This is the same problem that happened with my old sound card. I was using it just fine, and unplugged it, 10 minutes later, it stopped working... any suggestions?

Thanks,
Glurft

I am positive everything for my headset (Turtlebeach x11s) is plugged in correctly. I do not currently have speakers, as I used my headset for sound and communicated online. Do you have any other suggestions?

I've got a Diamond SC3000. Also for some additional information, when I go to Device Manager, C-Media PCI Audio Device has a yellow '!' sign next to it. The error message I receive with it is - "This device cannot find enough free resources that it can use. (Code 12) If you want to use this device, you will need to disable one of the other devices on this system." Thanks for the help guys.

I have looked, but haven't found the right one, if you could help that would be great :) (Not trying to ask for too much) Thanks for the quick response!

If it helps, this is the sound card:


EDIT: I found the driver site, and the exact sound card, but which driver do I download? (I have Win. 7 64 bit) http://www.diamondmm.com/XS51.php#

I downloaded it, ran setup.exe, restarted my computer, and nothing. I don't think anything happened... any suggestions?

So, here is my device manager - Sound, video, and game controllers:

This is what the C-Media Error is: