Strange collision problem

I'm working on a small (=P) game where the player controls two characters who moves the same way. I'm basing my game on DavidN's platform tutorial, found here http://clicktutorial.byethost9.com/

It works fine and both characters move as they should, except for one thing. As it is now the characters can move through each other and I don't want them to do that, since that breaks the gameplay idea.

I made a post in the Technical Support forum, but didn't get any replies so I thought it'd be good to add my .mfa file so people can see what's wrong for themselves.

Does anyone know how I can fix this?

easy :)

add to your "Repeat while "D/A" is pressed" conditions another one:

(RED LEFT) is NOT overlapping (Blue)

change those according to the correct collision checker and the correct object

That worked perfectly! Thanks!

To think it was that simple XD