What am I doing wrong (Z-depth)?

[YoyoBoy]

I'm trying to render an EXR with a Z-depth channel and it just isn't working. I have VRayZDepth enabled in the render elements, and I can view the Z channel in the VRay Frame Buffer. But whether I give the file an EXR in the frame buffer, or if I do it with the converter, I get squat.

[YoyoBoy]

Crap, I meant to post this in the Max forum. How do I delete it?