Help..Exporting Fallout NV animation

[Germany4Ever]

I'm trying to modify some of the Fallout NV vanilla animation in 3DS Max 2009, however the only problem I'm facing is instant crash whenever the game try to play the exported animations.

Using Nif Max Plugin, tried almost every singe export sitting and still i get crash when the game play any exported animation.

 

Can anybody advise on the issue?

 

Thank you in advance