Time limitations on swf

I have a flash file that consists of 4 scenes, 1frame per scene (all actionscripted). Basically it is a test that is allowed to run 75 - 110 minutes. (depending if the extra time box is checked). The problem that I am having is that when I make the "TimeToTakeTest" variable down to under 30 minutes, the test runs fine and ends appropiatly. However, when that test time is 75 minutes or greater the swf crashes at the turnication of the test (when 75 minutes have expired). Is there a limitation as to how long a flash file can run for?

thanks
Beyond Flash

I dont think there is a time limit on how long it can 'run'..

how are you getting the 'time' getTimer()?

lets see your code/approach?