By steps, what I did was: Install Mabinogi and update it, then installed UOT into the Mabinogi folder, then ran it, got a client.exe error with no login page. Tried updating UOT via update_autobot.exe, then ran it, same error. Then I downloaded JAP and placed the files into the Mabinogi folder. This time I was able to get to the login screen, but got the same client.exe error halfway into Pleione. Then I used the data packer to see if that would do anything. Ran Mabinogi, got the same client.exe error halfway into Pleion.
Sorry, should have been more descriptive, especially since I thought about it. <:T