Attempt to call a nil value

[Freddie_Faulisch]

Hey, i have got a little problem on BS_EFFECT_LUA(SFX on Monsters).
I just added everything from BS_EFFECT_LUA from my old files to my new files, just to make sure everything matches without bugs.(It worked fine on my older files).
Now when i go ingame and spawn Behemoth, it just shows no SFX, also not while fighting with him.
Client-Log says:

2016/12/25   05:16:10   attempt to call a nil value

2016/12/25   05:16:15   attempt to call a nil value

2016/12/25   05:16:24   attempt to call a nil value

The lua file on SFX/Scripts looks like this:

function mvr_behemoth_create( id_who )
call_sfx(id_who, 1, "sfx_mvratkbehemoth02", "Bip01 Spine1", 1, 0 )
call_sfx(id_who, 1, "sfx_mvratkbehemoth03", "Bip01 Tail4", 1, 0 )

end

function mvr_behemoth_battle( id_who )
call_sfx(id_who, 1, "sfx_mvratkbehemoth01", "Bip01 L Hand", 1, 1 )
call_sfx(id_who, 1, "sfx_mvratkbehemoth01", "Bip01 R Hand", 1, 1 )
end

I have also tried other monsters, including custom monsters with no luck.
Could be there anything else i need to change/add to make the reading of those lua files possible?

I hope someone can help me :/

Merry Christmas to everyone!