[HELP]Invisible People/Player Models

In Multiplayer, I get invisible Player Models. I do have CS:S and TF2 installed.
Screenshot :

But, when I do see players, they’re in a T-posing position.
Screenshot :

Any help would be appreciated.
I’ve already tried reinstalling Garry’s Mod.

The reason why the players is in a T pose is because you are using a ragdoll insted of a player model.
You can find all the default player models here: http://www.thecodingbeast.com/tools?id=models

I’m not really sure about the invisible players… Are you using custom models?

Even if I was using custom models, they’re the server’s. not mines.