Adobe Audition won't record in multi track mode

[SLLAB02]

I can record my guitar using the microphone jack on my computer while in Edit Mode in Adobe Audition, but when I go to multi-track mode, the "record" buttons are dimmed and won't function. I just switched to Windows Vista. What do I do to be able to record in multi track mode?

 

[arisejesus]

are you recording from one source only?

 

[SLLAB02]

im not sure what you mean, the guitar is all coming from my amp which is plugged directly into my microphone jack