Logic Pro 9 Audio Playback Issue

[abbyball]

I am having an issue with my Audio Playback

-I have an M-Audio 410
-Running Logic Express 9

-I am Not getting sound out of my speakers?
-I have the audio output set in my apple prefaces to the M-Audio but the only way I get sound is if my phones are plugged directly into the lap top.
I am getting midi sound through the m-audio so it is working. Also my speakers
are working when I play Itunes. It has to be some setting with in Logic but I can't find it for the life of me.

Thanks in Advance to you Kind souls you help just to help!!