Domain forwarding just doesn't work

I am trying to forward to

For years this worked fine, but starting several months ago, it stopped working for me and for many other people who try that url 


Just got off a 30 minute chat with GD tech support, which was no help. They basically said that everything looks fine to them, and that it is somehow my error or fault. Yet, when I try from any computer, iphone, and network in two different states, the forwarding fails.  Strangely, the "preview" button in the GD domain manager shows the right page.  This has happened to me for other urls that I am forwarding as well. Anyone have any suggestions?