I have already done the reset configurations, Edit configurations and even re-installing Source SDK but it still won’t work.
Mind being a bit more specific on what isnt working here?
Try launching under hl2 then add in the css gcf, then remove the hl2 gcf?
If I click on Hammer with CSS configuration 06 or 09, it says that there isn’t a configuration
Have you launched CSS at least one time? Do it.
I’d also recommend to reinstall CSS if you can handle the wait.