I've followed the steps here to try and improve my laser etch contrast http://support.ponoko.com/entries/491242-How-to-Improve-your-Raster-Fill-Engraving-results
I setup the file to use a medium etch (gray solid fill) and a thin vector etch at the sides (red outlines). I'm getting an error message every time I upload the file to the Ponoko site to purchase. See my files attached. I've double-checked my artwork three times. Anyone have any advice to fix it?
ai and eps.zip