Error: 5311
wth?

I was able to log in game with no problems until I created my SE account and Linked it with POL in order to gain access to post in FFXI official FORUM site...

Why am I being punished for trying to get access to the FFXI Forums??

Everything was perfect till I got access to this Forum.
I'm new here and I dont know why the game tells me such lies.

"The SE ID, SE password, or One-time password entered is incorrect"

HOW!?

I never changed it for it to even be "incorrect"... How is this happening!?

Help me out?