find pathing problem

Hi, guys,

I meet some "find pathing" problems with the example which in Construct2, it's name: Turret Defense.

the enemy only remember it's first level path when the level has already updated. this is the capx, I hope you can give me some good ideas how to let enemy find the right path at the "layout2".thank you so much!

here is the link:

docs.google.com/file/d/0Bz_jk09JVRwWc1B0RXlvZzA1WHM/edit