Unzel

Good evening everybody, have a strange problem . dmd is not showing anymore on display 3 i have 3 screen setup. playfield, and backglass work perfect. tried switching cables, en monitor setup in Windows. Strange thing: when i enable topper on 3d screen, then this Will show Perfectly on screen 3 but no dmd.. when i start the tablets in vp, they all work flawless. what am i doing wrong? it's driving me nuts. i Will post my pinballx.ini, and log tomorrow. but perhaps someone can put me in the right direction thanks i.a rob W