In most casual games, saved games cannot be sent and inserted to get you past a stuck point. But the really smart folks around here figured out how to do that for this game.
So if you just can't get it, then I have a saved game with the red box finished that I can send you via email and that you can then insert into your saved game folder and that puzzle will be finished for you.

Did you clcik on the yellow words in my last post? That takes you to the Walkthrough where you will find the best way to work that puzzle.