Common question “i downloaded ninja from ninja. using their key. got login from cqg when try to connect in ninja, get error “login in failure: the FCM you are trying to connect to is not authorized to use ninja trader with cqg.” help?”
I get this question a LOT… 
You are using a broker given nt7 key.
Go here: NinjaTrader stock, futures and forex charting software and online trading platform. Download registration. http://www.ninjatrader.com/download-registration.php
Fill out the form
Check Email
Replace the Key in NinjaTrader Control Panel Under - Help License Key -
Close NT7
Then Open NT7
Then you can add the other demo data feeds etc…
(Note if live trading it is a different situation - ie live futures trading live forex trading) but live data feeds do the above to solve the issue.
