Having Cut Issue with the BODY in skyrim but looks fine in 3ds max

[Zaselim]

Ok, in 3ds max the body looks fine but in game on the butt A cut appears on both left n right butt(some times it appears and sometimes its not, i think it depends on the movement). As you can see in the pics in 3ds max the body is fine but in the skyrim (Also has pics without cut) there's cut on both side of the butt.

Plz tell me how can i solve it, Thanks.

 

3ds Max 2012

 

Skyrim

 

 

[Zaselim]

i think i solved it by making a new femalebody_1, i checked with 10 diff poses, walk and run No cut so far.