Decent/landing preparations

Hi, All Maybe some one can give me a hint. I tried today 2 flights, VABB to VOCI and VOCI to VIDP . Take off and initial climb /cruise works fine, no problems there. Than preperations for decent and landing that is where the problems start.FMC entries oke , runway star etc. Than decending , switching from Vc and 2d panel freeze of simulation resulting in restart of FSX. Does any body has the same problem, or a fix to this? I read on the forum that it happens to more people. I have FSX fully updatedWin7 64bitQuad core 2.8 mhz4 gig RamASA evulotion/Fs scene sincerlyBob