URGENT - !
I want the ball to hit the door as it comes out of the tube, so that the door falls over, but the ball is passing right through the door as if the door is transparent. HELP! I'm going crazy trying to figure this simple thing out!

Thanks!


(Bonus question: Why, when I click on the View Compass, does my project now disappear into oblivion?). Can't figure out that either. View compass is noticeable screwed up because it has a similar effect on my previous projects now too.