AlliedModders - ModelChanger "ERROR" 's skin

I've seen that for each pack, the .cfg file were the same... So I put the HL² good vs bad pack.
I still have the "error" skin and in the console I see :

Code:

Bad sequence (1 out of 1 max) in GetSequenceLinearMotion() for model 'error.mdl'!

and further, I see :

Code:

CalcSequenceIndex: can't find 'idle_upper_knife'.

and so more CalcSequenceIndex...

I've seen that the meta unload command don't work at all for your plugin : I mean, to not have it active, I have to remove the line in metaplugins.ini, and to restart the server...