Got a problem

Wanted to add some long hair to game, so i rigged to avoid any fall troughs to the character on head movement,
i used this as a base
http://skyrim.nexusmods.com/mods/13648

I practicaly aligned it on the character, weighted it and exported with help one of the tutorials to turn FO3 format to skyrim
then i booted up the CK done all editor work, so i wnet to check it on some NPC, and then i got a prompt.

FACEGEN: Could not find bone "NPC R Clavicle [RClv]" for the head node.

I checked the nif, the node was there, so i really dont know what should i do now