Why cant I log into facebook?

[Greg]

Ive been trying to log in on my phone and my PC all day. Ive reset my password like 8 times.

When I'm on my phone, it gives me the error message "You must login first" after attempting to login.

When I'm on my PC, after typing in my email and password it just takes me back to the login screen with no error message, and when I try to type in my previous password it tells me that I already changed it, so I know the passwords im typing are correct.

Ive never had this happen before and ive been using F.B. since the beginning. Any help would be greatly appreciated... Cheers.
I dont think its a cookies problem, just deleted all my temporary internet files and it didnt work. No request for a verification code either.