External swf transition problems

i’ve followed the transitions tutorial :
http://www.kirupa.com/developer/mx2004/transitions.htm

but ive got one problem.
for some reason.
when i click on a button on the main timeline,
it keeps playing the same swf over and over.
it will only play main.swf,
no matter what button i press…

i click,
it plays the outro transition for the existing clip (main.swf)
but then, when the next clip should be loading,
it just restarts main.swf.

im thinking…maybe it could have something to do with
the preloader on the next swf?
im …soo incredibly lost.

help…
please?
;(

…thanks…