Adding frames for media error

Hey guys,

I’m currently working on a project that has been made by someone else.
The problem right now is that if I play the .swf that’s located in the folder of the .fla everything works fine in the movie.
However, if I open the .fla I get a message telling me I need a minimum of 200 frames to run the movie. Pressing yes or no doesn’t help, because after I ctrl+enter to play the movie it skips bits and acts all weird.

Everything in this .fla seems to be made in keyFrames, so no external ActionScript documents are present.

I am using Adobe CS5 myself and have no idea in what CS this project was made.

Any idea what could be causing this?

-MrKlozy-