Audio sync problem on embedded video file

Hi I’m really struggling with getting the audio the sync properly with it’s video file when I import a quicktime movie file and try to embed it. I’ve tried various things, importing at different frame rates, seperating the audio and video files and bring them in seperatly, fiddling with the sync tab in the properties panel
but with no joy I’m new to video in flash, Can anyone give me advice on setting for the source file and how I sould set up the import parameters ? frame rates etc

the source file is:
200 x 160 pix
4080.8 kb
100 frames/sec
.mov file

Advice would be really appreciated as i’m running out things to try