Importing mp4 video files into flash cs3

hi there,

i’m wondering…i usually have no problem importing .mov or .mpg files and exporting them in flash but for some strange reason, flash is not reading the mp4 files i have as “video” files. (even though i can watch them in quicktime.) however, i was able to import them anyway and export them as .flv files as normal. i thought everything was fine but then the video just sort of stops about three quarters of the way through and the sound drops out. (this doesn’t happen in the original mp4 files. anyone run into this problem before or is it just me? any suggestions? your input is much appreciated!

oh, here’s an example of what happens, when you click on one of the commercial links in the “what’s playing” section that appears.

thanks in advance,
denise
:h: