Help me! gmod wont load!

omg fakking steam. it wont load upp gmod. i really need help!

this is the message who pops upp when i start gmod:

steamstartup() failed: steamstartup(0xf,0x0012e584) failed with error 1: failed to take master pipe connection lock!

heres a picture:

http://filesmelt.com/dl/fail_steamer.png

im not mssnor. i just talked to him.

did you try reinstalling

yes wont work

Verify your game cache and defrag. If that doesn’t work you may possibly need to:

A. Delete the garrysmod folder

B. Re-name the garrysmod folder, example: garrysmod old

To see if it works. Also, did you restart steam?