setMask question

hej …

i have following problem …

i load swf movie into mc “container” on main movie.
i made rectangle, changed into mc, gave it instance name “block”

when i use the container.setMask(block) line this results in
the movie playing but no mask …

what do i do wrong this time ?

(thnx in advance for help)

Howdy…

Have you got a sample by any chance???

hej … peeps … found a workaround …

i placed a mask in the swf i load into my main movie
this works good …

still … i would like to know some more about the setMask command …

how to properly use this command ??