MediaDisplay component crashes my MovieClipLoader

[handepora]

Hi
I'm recently getting into the MovieClipLoader Class, which I hadn't used before.
I'm loading the external movies of a site by using MovieClipLoader and it works perfect. The problem arises when I add this piece of code in my main movie:

musiccontainer.loadMovie("mp3player.swf");

"mp3player.swf" contains a mediaDisplay and a mediaController component which stream a song in mp3.
If I omit that line the loader works OK, but if I make the call to "mp3player.swf" as shown above the MovieClipLoader crashes, and all I see is the progress bar looping forever (and duplicating if I load a new section)

I don't know how to solve this. Any help is much appreciated.