Game can not detect workshop addons
So me and my brother bought the game today. We wanted to try a new campaign so we decided to try the "Back to school campaign" from the workshop. We subscribed to all of the seven parts just like it said in the description.
The Steam downloaded the files. I started the game and clicked on the add-ons menu. Then the game loaded the add-ons and now i can see the list of the installed back to school addon parts.
My brother did the same thing, but after he started the game, and clicked on the add-ons menu it was empty and it said that there are no add-ons installed.
How to solve this problem? Why his L4D2 doesn't detect the workshop addons? (We did the same.. so i don't have any ideas..) Please someone help so we can play the game.