Hello Victor
I thought the DISPLAY issue was fixed as you already marked the other thread as resolved.
If you are using Putty to launch the configtool then it will fail.
Like I said start the VNCserver on the server and use VNCviewer to connect to the system.
You should then set the DISPLAY variable and launch the tool.
What happens when you run xclock ?
su - <SID>adm
setenv DISPLAY hostname:1.0
xclock
Cheers
RB