Men of War - Ultimate Collection DLCs

[Flickdraw]

Hey guys,

I've been playing the Assault Squad demo on Steam for a while now, and then bought the Ultimate Collection on Amazon http://www.amazon.co.uk/Men-War-The-...8958050&sr=8-1. It says that it comes with the Assault Squad - Game of the Year edition and on the box and disk it says that too. But I'm wondering how do I access the DLC which are supposed to be included in the Game of the Year edition?

I've installed Assault Squad - Game of the Year but on the main menu, when I click on "Downloadable Content" it just takes me to the Steam page in my browser and tells me that I have to buy them.

Should this bundle include the DLC's and if so how do I access them?

Do I need to somehow link the game to my steam account?