Error.....plz help

ok i have a

onClipEvent (load) {

action script
for sum reason when i click on the button dat loads the movie
under flash mx 2004 i get

Error: A ‘with’ action failed because the specified object did not exist.

and when i jus try da same thing but not under flash mx the swf doesnt load when i click/press the button.Any one know whats the problem?
thnx in advance,(im a noob with flash ~_^)