Pop up block on, but still getting pop ups in Safari

Hi!
Well a while back i was having trouble loading (www.dance.net) a site with my macbook. I was able to go to the site with any other computer on the same network. But on my macbook it was impossible. It still is, but I dont know what to do.. I tried to turn off the pop up blocker, and when i turned it back on, i kept getting pop ups. I have tried to restart safari, turn the blocker off and back on again. But nothing works..

Does anyone know how to fix it?

Any help is much appreciated.

Lisa