Facebook problems.

Hello,
I am having problems when log in into my face book account. When am log in using Google, the result is as this: (the connection is untrusted; and on technical details: WWW.Facebook.com uses an invalid security certificate. the certificate will not be valid until 11/16/2011 6.00pm and the current time is 1/27/2011 11:18pm. ( error code: sec-error-expired-certificate) and when i am log in using fire fox is saying server not found. What can i do to be able to log in my face book account without problems? please help.