Installing WAS4.0 on AIX

When I try and install WAS40 on AIX i get a message like this
"Cant connect to X11 window server using :0.0 as the value of the display variable"
What does this mean and how can you correct it.
Iam not using a GUI of AIX

"AixAdmin",
You have been asked several times to change your display name to comply with the Javaranch naming standard.

http://www.coderanch.com/t/71947/Websphere/HTTP-Server-help
This is your last warning before your account is deleted. Change your name immediately.
Dave