Error #1502: script execution timeout

Got the error
Error: Error #1502: A script has executed for longer than the default timeout period of 15 seconds.

and thats even after I set it to 100 sec in fla.
The thing is, the script that timeouts is the separate class/ package thats imported, any way to extend that timeout?
Its complex AES encryption script that takes a lot of time and now im stuck.
Dont want to jam it all in one file since its multiple classes/declarations etc.

Any ideas?

Wesp