Video won't stop playing

i have posted this one before, but didn’t get an answer, i will try to be clearer.
i have a flvplayback on my timeline which auto loads a video. On another layer at frame 20 there is a stop command. So, the timeline stops at frame 20 but the video continues playing, all is well. There is a button on the stage that resumes the timeline by telling it to gor to frsme 21. At this point i would like the video to stop and disapear. I have tried several things, but nothing works. Please help!