Hi Rita, first congrats on switching from dial-up... it's about time!!!
So all other websites open except for facebook? Is this at home or work? Some offices block sites like facebook or disable MSN according to policies.
Try this, go to Start > Run > and type "cmd" (without "")
Type: ping www.facebook.com
You'll see a number like 173.252.110.20
Type that number in your browser and see if that works