How to unblock apps.facebook.com in Chrome, Firefox, IE or Safari?

Whenever I try to start any application on Facebook, like Cafe World or Farmville or any other, I get that Chrome, Firefox, IE or Safari do not see, acknowledge, connect or find apps.facebook.com. On my other computer in the house everything works just fine. I can log into Facebook, see the wall, news feed, everything surrounding just Facebook. When I try to start any apps, no site, no connection, etc. Other sites working. "Oops! Google Chrome could not connect to apps.facebook.com" that's what I get on all other browsers.|||If facebook is unblocked than all of it should be unblocked try clearing cookies and cachee and see if that works if it doesint contact facebook