Product Key of GIANTS software

[jplp208]

Hello i have a question, i intend to install the dlc that are on the oficial website, for my version of FS 15, https://www.farming-simulator.com/updat ... rce=fs2015.
But when it asks for the Key product, the one I have does not fit in place to introduce the same one. Can you help me? I would really like to be able to install the DLC's. Is it another key product? I am using the one that came with the CD box and allows the activation of the game. Im await response. Thank you.