Harry Potter and the Deathly Hallows won't install on EA App

I have the original disc of the game and I have tried to install it that way. Upon completion of the installation, it tells me that there is already an updated version of EA Download Manager on my computer. I would expect it to appear in the EA App so I could install it digitally but it didn't. I have contacted EA Help and they have tried to help me, but they only told me that the game is really old and discontinued by Electronic Arts, and that may be the main error. I'm hoping for help from someone with the same problem!