Community starts but I can't click my shortcut to open it.

Hi I have just purchased stalker and I have noticed when I open it the steam community seems to launch and when someone sends me a message it pops up in the bottom right corner however when ever I go to open the community in game using the shortcut, it just won't work!

Has anyone else had this problem if so how can I fix this?

This has happened to me in S.T.A.L.K.E.R Shadow of Chernobyl, Oblivion and Morrowind.

Sorry if all I needed to do was search and I would find the answer. I tried but some fatal error kept coming up and it was annoying having to wait 60 seconds to try and search again.