Thank you,
and let me elaborate on my first post as reading it back i didnt include some things.
Console commands are paramount in games like CS and CS:S, and to have access to the console, right click on steam > Play Games > right click on CS:S > Properties > Launch Options and type in there -console and apply and ok it.
Now, start CS:S, then click the ` key ( known as tilde ) and below the escape key on most if not all keyboards. then type my previous commands. However, if your config.cfg is "read only" any changes here will be lost if you restart the game. So... with that in mind you need to get to your config.cfg which you should know where it is.
Hope this sorts your connection out.