Can anybody help me with this problem.

I want to create a blank movieclip object in flash using actionscript i.e
then load a picture in i.e.
but this is the bit i'm struggling with, I can seem to set it up so that
this new image is clickable i.e
>>mymovieclip.onRelease = function() {
trace("I've been Pressed");

Flash doesn't seem to respond to the event. I know I may have to use
addListener() but I can't seem to find an example which seems to work.