arma crash when I launch the editor

[s76x 0]

I have a pc with vista home premiun 64 bit and ARMA patched at 1.14 (queens gambit) with the msconfig memory launch 3072 option.

When I launch ARMA is all ok and also if I play the default missions...but when I launch the editor and I click on preview mission, arma go in crash and the pc return on the desktop.

I have see also that this problem there's only with addon islands and not with default islands.

why this???

[s76x 0]

ok I have resolve the problem..I had set the visibility at the max (10 km), I have reduced it at 7-8 km and arma don't crash anymore