I couldn't get it to work on my home computers using AOL, but at the office it came up fine using AOL. So who knows. I don't like AOL. It's just another layer of crud to get in the way of things working right. I probably spent 20-30 minutes fiddling with it.
If you're using IE maybe you can try Firefox.
Also what happens if you go directly to your store:
http://www.auctiva.com/stores/viewstore.aspx?id=153151
rather than to the domain name? Does that work? It worked for me on AOL. What didn't work was http://store.auctiva.com/gypsymart
Also running a tracert to store.auctiva.com in a command prompt window and then cutting and pasting the results may provide some insight to us on whether it's a computer/browser issue, or one with Time Warner.