I've got this problem that I'm not sure if it is at all premiere that is to blame, but try and help me anyway.

I recently started a new project, I imported my raw clips and put them in the timeline. I pressed play to check and see if all was fine, the actual visuals of the movie came up but there was no sound. Only when I scrubbed the timeline could I hear the sound. I tried importing other clips that before had worked but the same thing happened. I also checked out the acual dv avi file and played it in Wmedia player and the sound was there then. After that I reinstalled premiere but the problem is still there...
What is wrong ?