Ok, i cant figure out this one, my ball are colliding. its absolutly nothing in front of it! im absolutly clueless!

Here is a image from WED, this is the corridor i made in max, There is nothing wrong or wierd with the mesh, i have made alot and are familiar with max.


Here is a shot ingame, and it is here the ball just stops, its like a barrier, but it is nothing there!


Any clues folks? I appreciate the help dear community! :-)