This error means you have installed JKA in different location than you have your steam client installation. Nothing we can do about it.
Please go in launcher to settings and change JAMP to MBII Client. It will solve the issue, but you won't be seen on steam as playing game. You can also move your installation to the steam client installation folder.
edit:
Don't launch games you have installed with steam by running exe. Use Launcher (if game has one, like ours) or use steam's client.