Garry's Mod Create Multiplayer not working?

Whenever I try to create Multiplayer for in-game LAN, it gets to Initializing resources… or some thing like that then it gives me a, “HL2.exe has stopped responding.” G Mod used to work, now it does not… Please help. I tried removing my add-ons, cache, lua, data, etc… and still no luck. Help!

Try waiting it out, give it a good 10 minutes before calling it quits.