Cannot Generate Product Feed

I’ve got everything connected with the Facebook connect, pixel fires properly, etc. I need to generate a product catalog for our product (1 product, butt load of variables) and everytime I generate a feed, it gives me the following error endlessly:

“The file xml it seems not existing. Click into the “Try Again” button in order to refresh it!”

Is there a detailed tutorial on how to get this setup properly? I can’t figure out, no matter which options I select what’s going on.