JS41 - Lights in DX10 Preview

HiMy Strobes and Nav lights dont seem to function correctly when in DX10 Preview mode, If I select the default Cessna, and turn on NAV and Stobes and Beacon, I see them flashing very nicely, on my TH2GO display at a resolution of 5040x1050. However the JS41 stobes dont flash, the beacon doesnt come on sometmes, and the nav lights dont seem to show either sometimes, or they just seem to shadow the wing tips rather than actually glow as it were.I do have a modified HALO.bmp, and tweaked settings in FSX.cfg in order that my runway and external lights dont look like balloons on the TH2GO, and everything else looks very natural and works, and as I say if I use any other a/c LevelD, default etc then the lights all flash/glow as expected.RegardsJames