X11 problem in aix

Whenever you face problem with X11 forwarding, please refer the following steps to set it right:

1)      ssh settings:

Check the following settings in the configuration file sshd_config present in /etc/ssh:

X11Fowarding yes

2)      Stop and start the ssh service:

stopsrc –s ssh

startsrc –s ssh

3)      Start the X server:

startx

4)      Logout the user and login again.

5)      When you login, issue the following command to create a Xauthority file:

Xauth

6)      Now type xclock and it will start worklng.

Source Link: http://aix4admins.blogspot.in/2011/06/using-x11-forwarding-in-ssh-ssh.html

                     http://www.cyberciti.biz/faq/x11-connection-rejected-because-of-wrong-authentication/