My game freezes every time a zombies soul get collected

This is the tut i used:
http://ugx-mods.com/forum/index.php?topic=1567.0

it worked before when i added it. (No freezes)

then later i added some detail to my map. I haven't touched the scripts.

But now the game freezes every time i kill a zombie in the soul chest's trigger.

The freezing is a script infinite loop error, so something in the script (around where it handles zombie souls being collected) is crashing. I would seek help in the topic that you got the chest from.