FLVplayback issues

hi!
i’m trying to use the flvplayback component to stream video from fms server,
i have few flv’s (downloaded them from youtube) that wont play in my player,
they wont play even if i try to use the video component with netconnection and netstream classes.

if i try to set the contentpath property on the flash stage, it brings out an error but after compilation it works, the problem is that i want to dinamicly change the path, and it doesn’t work.
it use to get stuck on stateResponsive=false, but then i used a method which creates another video (
thisObj.my_FLVPlybk.createVideoPlayer(1);
thisObj.my_FLVPlybk.visibleVideoPlayerIndex=1;
thisObj.my_FLVPlybk.activeVideoPlayerIndex=1;
thisObj.my_FLVPlybk.bringVideoPlayerToFront(1);
)
to make the player work again.

anyone has a clue on how to solve this issue ?!!

p.s

i checked them files with an external metatag viewer, and they have metatags.