Cannot connect to my facebook page

Hello,
Whenever I try to log onto my facebook page it doesnt work! After filling out my email and password, and press login, I always get an error message, 'done, with error on page' at the bottom of the web page and it doesnt move. pls help as I can never log on using my system. did I accidently block something, i've tried to clear pop-ups but that isnt working either.