SWF Too large, No Bitmaps ?!?

Hi! I’m in a project where I have to do an expandable banner under 40kb and now the size of the swf is about 130kb.

I have loaded my PNG’s bitmap externally via Loader and the file size is still big.
I don’t know what to do!

I’d like some help from you guys and gurls!
**Here’s the fla… **http://www.bcarreb.com/exp_flash_w_ext.fla

Thanks a lot…
:hoser: