(Amnesia - TDD) How do I upload Amnesia addons to Mod DB?

[Mr.Amnesia550]

I made an addon for Amnesia - The Dark Descent, but Mod DB won't let me link it to the game. It says that there are no games, mods, or groups that I have permission to link to. If that is the case, please tell me how I might be able to get permission. If that's not the case, can someone still tell me how to upload as an Amnesia addon. I really need help!