Loading movie into target

i just did the loading movie into target tutorial on this site
http://www.kirupa.com/developer/mx/loading.htm
it worked fine, but when i went to apply the function to a button inside my drop down menu movie clip nothing happened. i am assuming it has to do with the fact that the movie clip button and the main movie are on different timelines.
I thought the _root function would tell it to load the movie in the main timeline and not the drop down menu movie clips timeline.
can anyone help me solve this little problem.
thx.