q menu error

ok so when i start gmod is single player it comes up like this:

http://img215.imageshack.us/img215/8938/fuckupd.jpg

and in console it says :
sandbox\gamemode\spawnmenu/spawnmenu.lua:132: attempt to index field ‘CreateMenu’ (a nil value)
sandbox\gamemode\spawnmenu/spawnmenu.lua:132: attempt to index field ‘CreateMenu’ (a nil value)

Well. Download C++ Notepad
Go to the directory and look at that line. If it says something you can understand, try that. If it said “Blasdasdsa” Then delete a file called “Blasdasdsa” but if you are not sure, post a picture.