Garry's Mod Crashes after 4 seconds

Garry’s mod opens, then closes. When I click the play button in the steam library at Garry’s Mod, it’ll open and show the blue screen and a loading box at the bottom right. After about literally 4 seconds, it’ll close and it’ll appear that I have stopped‏ playing it. It checked the task manager and it didn’t show hl2 .exe .
I have tried to restart my computer and check integrity of cache but it doesn’t fix it.

Please help :frowning:

Try reinstall the game?:stuck_out_tongue:

[editline]17th July 2013[/editline]

if it was that simple we wouldn’t be posting for help