Black Screen ... and fsx it's running

Hi to PMDG stafft and to all simmers Today I had this error: Suddenly , after I switched to one of the fsx's menù , I had the "sky black" .."some texutres losed" ... BUT FSX was running again ... sound ok ....too The event was been in: at the end of FLIGHT:= ........ CYHX to KJFK.WHERE? = ..................... ... Over New york city in approach to Runway 13.Scenery:= ............................ JFK of FSDREAMTEAM My system is: Windows 7 64bitì950 at 3,8 GHZNvidia Geforce 295;6 giga RAM DDR3fsx.cfg =as suggested by PMDG the problem seems the same as occurred with PMDG MD11, PMDG 747 etc.. As soon as PMDG released the patchs to update the problem has disappeared. (Never this error occurs with Level-D, (now with PMDG 747 and Same MD11) Thanks in advance for your help! Lucio