EZ-Flite BS-12 Headset adapter problem

Hey Guys,

I'm hopping someone can help me here. I just bought a EZ-FLITE BS-12 pc to aviation adapter, the headset works fine but my Realtek HD Audio system that comes on my motherboard won't work, so I hear nothing but faint static when I plug it in.

The issue is probably my Sound Blaster X-Fi Xtreme Audio card that I have for my main speakers. I can't use it since it doesn't have a mic in. Any ideas how to set it so I have 2 audio systems working at the same time?

Thanks in advance!