I have a really big problem and i was wonder who could help.

I have audacity and i usually plug in my guitar to my Line 6 Pod X3, and that into my computer.

For some reason i can record only one track and after i record it the rest of the tracks i record are silent but still have the waves, does anyone know how to help?

(My volumes are up loud enough also to clear that up)
DUDE i ****ing love you, like words can't describe how happy i am now, thanks soo much