Odd graphic problem

[Vuulgar]

I have CBBE and xp32 and I am getting an odd flattening of the butt when running or in combat. If I take the character out of combat....blooop.....out comes the butt. I am fairly new to modding and loving it in spite of the little issues that seem to pop up, or not pop up in this case. Thanks in advance.

[kajn]

Could be that the Body,  skeleton and related animations are not compatible each other.
Get a look in here as example:
 

http://www.nexusmods.com/skyrim/mods/16712/?