Looking around problem

when i try to look around on garry’s mod my person looks straight up and if i move the mouse, click or use the scroll wheel, he starts spinning around but he won’t look down. i use a wireless mouse but i don’t think thats the problem since i have used it before and it has worked fine.

Delete config.cfg

Where is that? in /c/programfiles/stea/steamapps/mysteamname/gmod ?

I found and deleted it but it didn’t work