I redownloaded FFXI and POL from Steam in order to play again - but when I go to enter my account information there isn't a Square Enix Account section, just the POL ID and password.

So, I just enter the POL ID and password and it apparently logs me in - but when I go to actually launch FFXI I get an error:

Error code: POL-5312 - An unexpected error occurred. Persistent problems can be reported from Service & Support.

My POL version is showing as 1.18.00n.

Anyone have any ideas? At the moment I can't play - and I'll have to cancel my subscription soon if I can't log in.