shadow render element doesn`t work in max9

[maxs]

hy, i can`t get the shadow render element make to work in max9, very simple scene with 2 boxes, 1 directlight with raytraced shadows, render elements active, render with scanline...get a pure black rendering for the shadow render element.

with max 8 + same scene + same settings i get a perfect shadow mask...

 

would be thankfull for suggestions.