The error specifically states that "Error 1172: Definition com.greensock.TweenMax could not be found."
I decided to got to Edit > Preferences > ActionScript and clicked on ActionScript 3.0 settings since I am using TweenMax in Actionscript 3.0. I located the path for the com folder in the Library, Source, and External Library paths just to be sure it was identified by Flash. It even does that auto selection feature that Adobe has when I type in "import com.greensock.TweenMax." It can't be where I typed it, because it's typed in with the other imports that work correctly. So I can't figure out what's wrong.
I'm pretty new with Flash, so I apologize if I listed my problem and didn't realize it.