Help! Audio from embedded video plays while Captivate loads

Help! I've inserted animation which is a movie into a series of imported powerpoint slides. As the Captivate file loads, the audio from that animation plays. Sometimes the audio will sound for just 3 or 4 seconds, other times 6-10 and will continue through slide one. Does anyone have any suggestions?

In preview mode, the audio from the video does not play.

Thanks