Video in MC suddenly stop?


i’m using flash mx 2004 (v7.2) for my project. i’m exporting a very² long video (in *.flv format) about 13 minutes and 11 seconds (19779 frames). but the video “STOP” playing at 10 minutes and 39 seconds (14502 frames) later. How come? I didn’t put any stop(); in the timeline. Just the video. Any suggestions to bypass this?