Flash cs4- flash compiles fla, but broke with no errors?

I’m using Flash CS4 and flash player 10,0,12,36. My fla compiles completely when i “Test Movie” but it loops as if it didn’t compile correctly- AND it gives no output or error messages. I have no idea what could’ve caused this.

If i change the code to intentionally produce an error, it will then display an error message. My app has an external swf file that it imports if that matters. But like i said it all worked fine just 2 days ago, and i don’t think my cat jumped on the keyboard -accidentally deleting anything since there are no error messages. Any ideas? Thank you very much! -b