Need help with my new mixer

[Articthunder666]

Hey everyone.
Today I received my Behringer X1832USB mixer. I've been playing around with it for a little bit and everything seems fine. My only issue is that I can't seem to get any audio going through the red and white audio input to record in Audacity. I can get my mics to record and I can hear the music I play in my headphones. I just can't get it to record in Audacity. I have my recording device set to USB Audio Codec and I have an RCA cable running from my mixer to my headphone jack in my computer. This worked perfectly with my old mixer but for whatever reason it's not working now. Any help would be much appreciated!

[panicBoy]

I may regret this question, but are you using a USB cable between your computer and your mixer?