Flash CS3 Has stopped Working

I am avid flash fan and presently working on an interactive project that’s bound to be quite sizable. But whenever my fla file reaches about 3MB (which is just a fraction of the intended size of the project file), i get an error prompt that says “Flash CS3 has stopped working” when i try testing or publishing my movie. Initially, i thought it was a Vista issue but the same occurs on an XP run system too. I also used a 2Gb RAM system to no avail. This is such a major setback for my project and i need to figure out where the problem lies and the solution.