Dedicated Server Tool and Addon Issues

Hello, I set up a source server for Gmod and whenever I connect, none of the addons work, or they glitch, and non of the tools in the menu on the right hand side appear. This also happens in local multiplayer. Any idea what happened?

I have a Dell poweredge 1600SC server with 2gb of ram and 2 intel Xeon 3GHz CPU’s. It os running windows server 2008 enterprise. I have 2 gun addons, a bomb, and a few custom models