Win 7 - 5.1 Surround help!

Hey there! I'm running on a windows 7 Ultimate 64 bit system.

I'm using the sound card that comes with the Rampage 2 Extreme motherboard, which is the "SupremeFX X-Fi Audio Card".

I just recently bought a samsung home theater surround set from samsung and I'm having problems getting 5.1 for my games, I only seem to be able to get stereo out!

I'm using an optic cable from the receiver to the back of my PC.

Here's the thing, when I go to the sound options, doubleclick the SPDIF (which is my standard sound receiver thing) and click TEST on either of the 2 "DTS Audio" or "Dolby Digital" I get sound from all 5 speakers, but not from anything else. No games, no music, not the system error sounds, nothing. I JUST seem to be getting 5.1 from testing! Also, if I jump a few tabs to the left and go to "Advanced" I only seem to have a list of 2-channel options.

2 channel, 16-bit 4800hz
2 channel 16-bit 88200hz
ETC
ETC
ETC

I assume there should be 5,1 options there?

My drivers are up to date and apparantly there IS 5.1 going on, considering both TESTING gives me 5,1 and DVD movies are in 5.1. I just DON'T seem to be able to get 5.1 for anything else, is there an option I'm missing? I've tried nearly everything now and after several hours of looking I thought I'd come here for help.

Please do ask if you need additional information but keep in mind I'm no expert when it comes to sound, so please do present solutions in an easy way if possible =)

So RECAP: I get 5.1 for movies and when TESTing, but nothing for video games (Example; Left 4 dead 2 or Burnout: Paradise).

Well all music and system sounds will only come out of the front left and right channels. I find that with some games you will have to go into the games option menu and change the audio options to 5.1. Since its working for movies and testing that tells me its setup right via the soundcard the problem most likely is within the game options.

I had already done that, no difference though.

I am not 100% sure on that but I dont think you need an HDMI cable. Have you tried doing an Analog connection and see how that sounds.

Dolby Digital Live compression from the sound card is possible. I don't know if his sound card can do that.

Yeah, you're right. I am running a home-threater-boxx system so it's very limited, what I can do. There's no MULTI CH input behind it either so my only option would be to get the optical cable to work with 5.1 for games.

Is there no software I can use either? I tried ALchemy but it didn't seem to be doing any difference, wasnt' even 100% sure what it did.