Problem With Flv

Hì u all,
I'm working with flash 8 and I have a movie.flv streaming in a swf that is loaded in another swf that is also loaded in another swf.
When I test the swf everithing works fine, but when I test the entire web site in the browser I see the swf that conatins the flv, but not the video and neather the player (a costumized skin). Can this problem have something to do with a lockroot set to true in one of the swf that contains the swf of the flv?

Saltarello