how to assign action to button from timeline

SIr,

I am newcommer I have 29 buttons on stage by which I have to call 29 swf externally .Can I assign action to this button in keyframe to call external loadmovieNum. I can assign directly to button but I want it by keyframe.

I have tried by instancename. on release loadmovie but there is a problem

urgent........

awaiting

thanks

theInstanceName.onRelease(){

clipToLoadMovie.loadMovie("urlToMovie.swf");

}

Actionscript Code:

theInstanceName.onRelease=function(){
trace("Hello World");
}