Which artist makes that Bunkerhouse 2 object.
It appears not to be any that I have.
Is the forcesimpleobstacle = 3 in the FPE file for that object?
EDIT:
Can you try this for me please.
On a blank map place this object in the level:
Sandstone Structure (17).fpe
Press u key before setting it.
Press tab key once.
You should be able to see the floor now in clip mode.
Place 3 or 4 clown zombies in the room. Leave a door open for you to get in.
Place a start marker.
Place a weapon for yourself.
Press the rocket to launch test game.
Collect the weapon and walk into the building, and out the other door.
The zombies should notice you and then start to follow you thru the door to attack you.
Let me know please if this works for you.
Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz, 2400 Mhz, 4 Core(s), 4 Logical Processor(s), 8gb RAM, Nvidia gtx660, Windows 7 Pro 64bit, Screen resolution 1680 x 1050.