>imported an MP4
What is INSIDE the file?
Codec & Format information, with 2 links inside to read
-read both links in reply #1 http://forums.adobe.com/thread/1270588
Report back with the codec details of your file, use the programs below... A screen shot works well to SHOW people what you are doing
Also, did you allow time for audio conforming?
Read Bill Hunt on Audio Conforming http://forums.adobe.com/thread/726693