I have an exsiting DSFW server (OES2 SP3)

I am trying to add an new OES 11 SP1 DSFW server as a secondary server

Running YAST,I get to the eDirectory Configuration - Domain Services
for Windows window

Forest Root Domain : abc.com - filled in but greyed out
Existing domain administrator name : BLANK but greyed out

Specify Administratior password - editable .... When I fill this in and
press next, the hour glass comes up, does somehting, and then comes
back to the same screen.

The problem appears to be that the Existing domain administrator name
is blank

How do I fix this ?