Well, I tested it on my work connection which is what concerned me. I think it is the Proxy that we have at work. We use ISA server for our web access. Once I went a different route (same computer) it came up fine.
I'm OK with that. Hammered isn't really supposed to be a work-safe site anyway. Still, I'm curious to know why it wouldn't load on the web proxy. As far as I know (and I should know) we don't block anything.
I think my answer should be excluded from whatever you were looking to learn. I'm betting it is being blocked by a corporate firewall. I just realized that I don't see anyone's avatar if it's hosted by Photobucket.
Memory can be tempermental. Try cleaning the contacts, sometimes they get dusty and the memory doesn't get recognised. If you have a mate with a similar spec PC, see if the ram will work in their PC. If it is dead, buy another 512.