Adding new player models for darkrp characters

So ive been trying to add new player models for darkrp classes and i have failed really bad. i added a billy mays character model and it worked perfectly. now im trying to add kingpin from this file (http://www.garrysmod.org/downloads/?a=view&id=76991) and i edit the shared.lua file to this directory for kingpin. Models\Player\Slow\jamis\kingpin\slow_v2.mdl and then i upload the same files to my fast download server and for some reason the mayor model comes up as an error in the server (im adding kingpin as the mayor model) please help me its really starting to bug me