i bought rocksmith 2014 from steam when it was on sale. i activated it with the cd key from steam and everything was fine until yesterday, when i launched the game and it made me log in then input the cd key. i have tried everything, it always gives me an error that and  i need to retry. it doesnt tell me if its my connection or the code or anything besides it doesnt work. (typical ubisoft). ive called ubisoft 4 times and it still doesnt work, ive uninstalled then reinstalled it, rebooted literally everything in my network. the strangest thing is that until yesterday, uplay did not show that i owned rocksmith 2014 when i activated it via the uplay application. it is now activated but rocksmith still asks for the cd key. ive tried everything, please help. ive bought over $70 in dlc and countless cldc songs.

You're better option is to work with ubisoft support (a ticket might hold more power than a phone call).

 

We won't be able to give more insight than the clasic and basic recomandation which i think you already tried... Unless someone encountered that issue before and still remember how he fixed it.

Ran into an issue with another user here having an issue running rs and he nailed it down to Origin. If you habe any Origin games consider disabling Origin.

 

Also ensure Admin rights when inputting the key, if its asking sounds like something may not have written properly.