Cant Jump: Unknown Command JUMP

Hi! Thanks for reading. I’m having problems with my garry’s mod. I’ve tried reinstalling it and all that but nothing works. Basically, When I try to jump nothing happens, And when I open the console it says: Unknown Command: JUMP. The spacebar key is binded to Jump, I’ve tried binding it with the .cfg in the gmod folder, console and the in game options menu but that doesnt change anything.

bind it to +jump

[editline]8th March 2014[/editline]

bind space +jump

Wow such an easy fix thanks xD