su not working?

[Måns Nilsson <mansaxel@sunet.se>]

Hi,

(Solaris 8/Sparc, gcc, Heimdal-latest built with v4 
 compatibility against latest KTH E-bones.)

I'm probably just overlooking something here. I'm trying to get the heimdal
su to ask for my kerberos root instance pass-phrase, but it just skips to
the normal Unix root passwd query (which works)

There is no manpage... 

I'll gladly add anything that comes up to the documentation and submit a
diff, but I need to understand things first.. 

All help appreciated. 
-- 
Måns Nilsson            Systems Specialist
+46 70 681 7204         KTHNOC
                        MN1334-RIPE