Help with bodygroup

[Ivitokun]

Hi all, can anyone help me with change bodygroup.

I have model's with bodygroup (~12), but i can't change them.

[lua]
function setmodel (ply)

ply:SetModel("models/humans/modern/Male_06_05.mdl")
ply:SetBodygroup( 3, 2 )

end
concommand.Add("stmodel", setmodel)
[/lua]