Bridge Export Panel grays out Start Export

Hi gang,

I have 30 png icons at 84 x 84 x 192ppi and I want to batch export them at 200 ppi. I have the icon files selected in Bridge; I made a custom Export to rez to 200ppi and I saved the custom export. But the Start Export remains grayed out, even tho the 30 PNGs are selected.

What am I missing? Is this not the replacement feature for Image Processor and the megascript called Image Processor Pro?