*Help* Make an objects chase player Options

[rewells]

I'm working on some puzzles and can't figure out how to make something work. I'm trying to create a room like the one found starting at 6:32 in this video: http://www.youtube.com/watch?v=RHClvvrhmxw...;feature=relmfu

There are three large balls. When the player gets within a certain distance, the balls start rolling in the direction of the player, and if you get hit you take damage. I want it set up so that when the ball collides with the player he is transfered back to the entrance of the map.

What I have tried but doesn't work: I made ball events set to approach player and activate on player touch that transfers to player to the start of the map. The events still move kind of erratically (as in they approach but randomly move left and right for some reason) and if they touch the player while the player is NOT moving, nothing happens (it works fine if the player is moving and collides with the event).

Can anyone help me?