MI-26 with cockpit MI-8 not work

[Anski]

Hi, I tried to fly the MI-26 with the cockpit of the Mi-8, but when I run, once in the cockpit, the device explodes immediately!

 

At the level of 3D that's the MI-26 that appears, but I think there's a 3D overlap problem, and I not solve the ...

 

Thank you in advance if you have an idea.

 

Sorry for my english