yast2 and xfree on 9.1

I upgrade to 9.1 on all my machines and now I have a problem to open yast2 window on the net. I am aware of the security setup change in X server and now I use ssh to foward X clients connection However if I log as root on a remote machine from the pc on my desk where I am a regular user, and from that window I type "ssh <myusername>@<mymachine> /sbin/yast2" the yast2 windows opens empty with no command icons component, probably a sign of no root permission. Should the server be started as root? Hardly I can figure out why? Any clue on my wrong understanding and suggestion on how to manage yast2 remotely? Regards