Is my preloader screwing up my actionscript?

Hello everyone,

(In reference to this tutorial: http://www.kirupa.com/developer/actionscript/loading_random_movie.htm)

Im new to this forum and also new to flash. My question is I have tried using the actionscript on this site to load external swf’s randomly but it will not work. It starts to play both swf’s at the same time! I do have a preloader at the start of each swf. Also, my swf’s are not movieclips, they do have several layers and movieclips within them. Does this matter? Any help would be greatly appreciated.

Thank you.