Some days ago I bought (on DVD) the boxed addon PMDG MD11. For a few days it was running perfectly until yesterday night when suddenly a problem appeared . After I customize the plane in the Airline Options - displays panel or Equipment panel etc. (e.g. Flight director or ND simbols and Engine Data (Dial, Tape), etc..), or at the Load Manager (LBs/ Kg), I Save the selection with OK and when back, all selected settings are on the left side and they have not been recorded, so I need to reselect all settings in every flight. I dont know the reason for this and I Would like a solution from your experience, if it were possible. I uninstalled and reinstalled it several times and always the results are the same. If you need an other explanation please tell me. I think an instruction can be changed in a File after the DVD is executed and the program installed. Should be necesary disconnect the Windows fire wall or other protections programs when installing? Thanks in advance.

1) Sign your posts with your real name or it will get deleted.2) Make sure you run FSX as admin