Premiere 6.5 problems

I just downloaded Adobe Premiere 6.5 and I want to take some audio from a movie I have which Ive downloaded. I import the movie file (.avi) into the library. I click on it while its in the library and it works fine, I hear it and I see it. Then I put it into the timeline and there is no audio. Even when I export it there is no sound at all. Am I forgeting something stupid? Help!