New enemy crashes one map, but not another!?

[Statyk]

So I'm making a new enemy... It's working great! but for some reason, it works fine on my testing map, but when I activate it on my main campaign, it runs for a second or two, then the map crashes and the game shuts down. I don't understand because it works fine in one map... But the map that really matters crashes. what could be wrong? My OTHER new enemies work fine in the campaign though... I don't understand.

notes:
- the map doesn't have a .map_cache
- the enemy is saved in the main folder AND the custom story folder where the campaign is located
- the enemy is an altered version of the Brute
- like I said, it works fine in one map, but not the main one

QUESTION:
Would a music priority issue cause the game to crash?