DLC for Total War: Attila is missing

[Nutzgo]

Yesterday a friend giftet me Total War: Attila with the Viking Forefathers Culture Pack, and I myself bought the Longbeards Culture Pack. Downloaded it all, installed it - but when I start the game it says that I dont have the Viking DLC, and when I check my DLC-list in Steam, it isn't there - even the Steam Shop say that I can buy it, but not the Longbeards DLC because I already have it.

So I logged into my e-mail, where I got the receipt for the gift, and tried to re-activate it, but then I get this error saying: "This gift has already been redeemed". Tried restarting Steam and my PC, then I got " Scanning for steam licenses update". Then I tried to refresh my Steam files (https://support.steampowered.com/kb_article.php?ref=3134-TIAL-4638) - restarted my PC again - and I'm back at the first error.

What do I do??

[Nutzgo]

So.. I kinda did find the solution.
Heh.

By coincidence I checked did check my Steam Inventory (not the game library, but the inventory where I get all these trading cards and etc) and I actually did find the giftet and received DLC, and then realised what the error was: I had accepted the DLC gift before I accepted the main game gift. In my inventory I could choose between gifting the DLC to others or install it to my own game.

*facepalm*