flash actionscript: Created a custom shape on my stage and it is a mask - want through actionscript
to load images from my library or movieclips from my library into the mask on
my stage - when I use the code, it switches out my mask on the state and
replaces it with my images or movieclips from the library, instead of masking
them inside of the shape. Any advice?

How are you doing this masking? Is it a timeline mask or dynamic mask (using
ActionScript, specifically the setMask method)? Timeline mask may also use
ActionScript to render the effects. If it is a dynamic mask, are you sure that
you are masking the correct mc? If you need more help search the helpdocs (F1)
for 'setMask'. If that doesn?t help post some code.