Player Models = Kleiner

Every time i try to use a downloaded player model, or even some of the HL2 ones they all dont work and make me Kleiner instead. Only Combine, Metro Police, and Breen work. What’s wrong and how do i fix it?

Some servers don’t have the model so it resets you to default player model (AKA Kleiner.)

I cant even do it on my own single player game though