FLVplayback source not changing

programming flash
1

Hello,

I have two folders, one with my main fla file and one with videos I want to load on my FLVplayback when clicking on menu buttons.
So I set the video source for the first time via AS3:

videoPlayer.source="…/sample.mp4";

Which works fine, and the video loads. But after that all the other videos just doesn’t load, like the source can’t be found. I get no errors.
Here is the function for the buttons:

function video2(event:MouseEvent):void{ videoPlayer.source="…/video2.mp4"; }