Check your audio input source. In iMovie, select the 'microphone' icon and make sure you've got the built-in microphone selected. Just to make sure...you're not importing the project.?.?.?...it's directly from the MacBook cam?
yea it's directly from the macbook cam and mic, I saw if I plugged in my M Audio device that I can click on fast track but can't get the sound to come through like in Garage Band, but iMovie lists fast track as a input