'any as3.0' is not a correct statement in any context , but i will tell you that , stop(); is a supported command from way back before flash mx. Its probably one of the first methods ever supported by flash , i think it was even in future splash player. So your problem has nothing to do with there being or not being 'any as3.0's in your file. You say your having this problem in cs3 and cs4 ? what are you export settings ? What version of the flash player are you running ? Where are you saving this file ? Are you receiving any errors via the output ?