Adobe Audition Adio Hardware setup problem (1 Viewer)

Hello everyone, I have used Adobe Audition 3.0 for recording for some time now and I've never had any problems. However recently I had to uninstall my sound card driver( I use a Asus Xonar D1 Audio). After downloading it again I cant get Adobe to work. The problem is I cant get both speakers to play. When I go to the audio hardware setup in Adobe, I get this in the output box:
Stereo: L,Ls,C,Lb
or
Mono:L,R,Ls,Rs,C,Sub,Lb,Rb
I can only select one of the options and therefore only one speaker works. If I select L, then I only get sound from the left speaker, R-right speaker etc.
Can anyone help?
Thanks

Melkor, I don't have the answer, to your question, but I moved your post here to the PC/HTPC area where it stands a better chance of getting answered.