Loaded external SWF shows stuff outside scene

HI,

i got myself the follow problem:

I made a main flashfile that loads external SWF’s into a container, and it all works fine.
BUT: in my external swf, i have some stuff outside my scene that come flying into my scene during the animation. --> If i load this external SWF into my container, i can see those things outside the container…

Any idea how i can prevent this??

Thx!!

+sidenotes: main fla is 800600, the container and external swf’s are 550400