I have got a serious problem with one level(it is going to be included in my sp level pack), and well, I need help.

This level uses the special trigger(or destruct scenery) abilities, its about tile cache and stuff like that. Everything was working fine to one moment of the level when the events just refused to work properly(level is acting like there is no events there). And here is my question: How can I make it work? Is there still any hope for the level or do I need to delete many of the events included in this?

Here is the level:
http://www.speedyshare.com/files/28294134/dote2.j2l
Tileset:
http://www.speedyshare.com/files/28294149/Castle2N.j2t
And how do I go through this level when this bug appears:


I hope you can help me...

Edit: I forgot to mention, in this level when you shoot a column the ceiling collapses. It uses many trigger sceneries.