Shades of Darkness - Discussion

Hello! I will describe a problem that I cannot solve, even after reading all the forums and contacting technical support. Please help! I installed the game "Heroes 6" from a disc provided by Buka, along with the "Adventure Pack" expansion, also from Buka. Everything worked fine. Recently, I purchased a disc (also from Buka) for "Heroes 6: Shades of Darkness." When installing the new application, the old version was uninstalled. The new game was downloaded and installed. Now, version 2.1.0 is installed, but it is in English. All my previously purchased games, the two expansions, and the new "Shades of Darkness" expansion are blocked. There is no connection to CONFLUX! It says: Connection failed, invalid key! There is no way to enter the code for the new expansion because there is no connection to CONFLUX! What should I do? I am waiting for a response. Thank you. I have never had such connection problems before.