error message please help!!!!

[[SAB] Seph98]

hey im new here... im making a map (obviously) and i have a maze on a corner but this error message keeps coming up

 

Message Severity: 2

D:\src\FRONTLINE_PC\FrontLine\Source\EntityDroideka.cpp(1540)

Droideka fell thru' terrain, x = 526.046570, z = -907.310791

 

when i spawn as cis it crashes and when i see a droideka as a clone it crashes

HELP PLEASE!!!

 

thanks

seph