After you add the games plug-ins to the list of plug-ins, you still need to load the plug-ins to use them.

1. Select Window > Settings/Preferences > Plug-in Manager to open the Plug-in Manager window and display the list of all known plug-ins.
2. Find the plug-in you need and click the loaded check box to load the plug-in. If you only turn on the auto load, you must restart Maya to load the plug-in.