JPEGs to "HDR" in CS5 Problem

[pez]

I have an image that I want to lightly tone map (RAW). While merging to HDR works great from RAW images in bridge, I have only the one image. I used LR3 to make three versions of it with different ISO's. But when I try to get CS5 to do the HDR rendering from Bridge like I normally would do with RAW images, the layers show up and it seems to begin calculations, but then just stops! No image opened. What am I missing here?

EDIT!!- Figured it out, I think- it worked when I didn't use Mini-Bridge...