mdg 748... tried the config above dont work either ..
You should NOT use the config posted on the forum, now the airplane is already supported, that's why we removed the file. And, as explained in my last post, you must remove any custom configuration you might have made or downloaded.
Be sure you don't have ANY previous GSX.CFG file you made or downloaded, either under %APPDATA%\Virtuali\Airplanes or under the Simobjects\Airplanes\PMDG 747-8 folders inside the simulator. If have such files, remove them, otherwise they'll take precedence over the GSX internal configuration.