I'm not a techie but I'll give you some basics to try
Are you using a link or are you typing into the address bar?
Personally; I'd restart my PC and let everything reset
Then open your browser - what are you using btw? I found IE which I normally love; sucks for facebook; I use Firefox/Mozilla and it works much better.
Then go to the address bar at the top and type the www.facebook.com in
Then try your log in info
If that doesn't help; I'm not sure cause I'm on facebook and not having any problems this evening.
Do a search for a CM member S/N PinkSodaPop - she has a free PC support group here on CM and if needed she will open a chat or remote session with you to help you fix your problems; she's helped me several times - swell chick
at 11:59 PM on May. 15, 2010