onLoadInit::Am I missing Something?

Well,hello there!!!
I have a console (main movie) which loads external swfs (using
movieClipLoader)
In each ext. swf there is a function (placed in the 1st frame)
which is called from the console on user demand.
This works fine…But is some cases, I have to call the function
as soon as the swf has completly loaded (onLoadInit or onLoadComplete)
and this dosent’ works!
The function calls soundObject.start(0,5).The sound is attached to the movieclip
from the library.
Any ideas???