DarkRP no Group03 models

He all,

i have a littel problem.

Error Vertex File for ‘Humans\Group03\male_03.mdl’ checksum 2003602517 should be -1034868466

all the models of the models/player/Group03/.mdl does not work!.
It’s not a error. but it’s transparant.

is it the server side or the cliend side.

Gmod 11
DarkRP 2.4.1

Can any body help me?