sound card works, but headphone port on Dell Inspiron 5150 doesnt
 

So I just installed Fedora Core 2 on my laptop (the first time putting linux on a laptop) and everything went swimmingly.

My only problem is that when I try to listen to audio on my headphones, it won't come out, and I can't adjust the volume of the headphone port in the volume control settings in GNOME.

Any suggestions?

Thanks.
-Matt