Layering / Masking problem

Hi, hoping someone can help me here as it’s probably very simple but I can’t figure this out :frowning:

I’m trying to layer the attached so that the text is at the front, with the bubbles behind.
Trouble is (maybe because the bubbles are actionscript), I don’t seem to be able to do anything with them layer-wise :frowning:

I’d also like the bubbles to be masked so that they don’t show in the rounded corners of the rectangle (going against a white background, wouldn’t look right with bubbles breaking out of the rounded rectangle).

Any pointers?