ssh tunnel / x forwarding issue

From: DMZ (dmz_012@yahoo.com)
Date: 10/27/02 

From: dmz_012@yahoo.com (DMZ)
Date: 26 Oct 2002 16:50:08 -0700

I am on server-1, and I am trying to open an x-window from server-3.
But server-3 is on a private network. There is another server - server-2
that can access server-3 and is also accessible from server-1.

So I use ssh tunneling from server-1 to reach server-3 via server-2

server-1# ssh -l user -L 2222:server-3:22 server-2

and login to server-2 - the I ssh to to server-3 via localhost

server-1# ssh -l user -p 2222 localhost

 This way I login to server-3

Now how can I open an x-window from server-3 after loging in. Server-3 has
ssh x forwarding setup. The problem is the display and xauth settings

Help