I'm trying to add a layer to a Mapufacture map using my blog's feed

I thought it was possible to do this, but when I try it on mapufacture, I just get a "loading" dialog and get stuck there. I'm really just learning this as I go. So I'm thinking I'm probably giving it the wrong feed for my site. Is there a way or a button somewhere that will show me the actual feed address of my geotagged posts? Is the geoprss feed different from my blogs actual feed?