Collision problem with map entities

My map entities are acting as if they have box-like collision of hulls like .mdl when colliding with my physics ball. If I take a hollowed block.. remove the ceiling and compile it to a map entity.. My physics ball acts as if there is an invisible ceiling instead of letting the ball drop inside.

Jason

I have been able to work around this problem by creating the floor and the walls as separate .wmb files.

Jason

probably ,wall and floor work like .mdl .

I had thought that map entities created and compiled in WED would have polygon level collision...

Jason

The same by me at home!