I downloaded the installer, the data, and I followed the instructions on the readme.txt
OS: Windows 7 x64
Video: Radeon HD 6800
When I launch the test server POL it gets to the screen where normally you'd see the shortcut load on the left hand side. In its place is a red square, when you mouseover it text below displays "Array error".
To proceed I have to wait for it to fully load, and click on Final Fantasy XI. Then as soon as I click play on test server and the window goes away... I get a message that the program must be closed.