When I log onto Final Fantasy XI, it tells me that I need to register the Rise of The Zilart Expansion pack. I click accept and it brings up anouther message saying that the expansion pack is not installed. I then followed the Guide in my Windows Instruction Manual on how to install the expansion. I followed the steps until I recieved this message: ERROR UCS-5534 With a note saying that it could not be registered because the expansion was already installed. I loged on to FFXI again and recieved the same message. I am able to play FFXI with no problems, though I may encounter them later as I am only Level 12. If anyone could help me install the expansion pack I would be very grateful. Thank You.