I can't publish photos to facebook anymore with Iphoto...

I can't publish photos to facebook anymore using Iphoto...A small window opens requesting my FB email & password and to accept FB's terms. Once I add the info and hit "login" a message shows underneath saying: An unknown error occurred. Please try again later.
This started after I changed my password in FB... I tried to log out from FB; I quit Iphoto and deleted the FB account in Iphoto to re-add it; I went to Apps allowed on my FB account... and Nothing works!!! This is SO annoying! HELP????????