Sorry i bought JfK2 and i can see that all three products are registered
Three ?? What's the 3rd one ?
Again, if your really installed JFK V2.1 using the full installer and it's shown as Active on the Addon Manager, and both the Addon Manager and Couatl menus are under the FSX Addons menu, it means everything's running correctly, and the scenery must show up.
If you have GSX installed, you can try create a log, by enabling Logging in the "Troubleshooting" section of the "GSX - Settings menu", then exit and restart FSX, go to JFK and exit again. You'll find a Couatl.LOG file in your %APPDATA%\Virtuali folder: post the content of that file, or send it by email to the support address.