Are you using a unzip program like 7-zip or rar... or are you using windows to unzip the files? It really should matter. Unzip the files to your desktop (open the zip files with windows and drag the contents to your desktop) and open one of them to ensure there is data in there. It's XML code, but you'll be able to decipher cache names, coordinates, etc. If you do see those then make sure that those exact files are in the gpx directory on your OR. If you don't see anything cache info in the PQ, then you need to look at how you have your PQ set up on GC.com.