Flash texture trasparent

I have to use a texture in flash with the transparent background, but when I use renderstate alpha or multiply, the texture it becomes of different color.
is there a way for the background of a texture or a video to make transparent?
thanks to everybody

flash trasparente.zip (411.1 kB)

i suspect its not possible to get an alpha channel back from the flash renderer.

you could team up with the recent chromakeying thread to replace black (of any color) with a transparent color, but you will get nonantialiased edges then.

or you could find or write a shader which uses a second texture to create a mask. then you can use a second flash film to create a second texture which is animated in sync. or make your flash movie twice as wide, left part is the mask, right part is the content, and use a similar shader.