On a Windows Advanced Server 2000 2 node cluster with SQL 2000 SP3 installed,
I'm trying to apply SQL 2000 service pack 4, but at the point where you enter
"a username and password that is a valid administrator account on all nodes
in the cluster", I do that but get this error:  The specified account cannot
be validated to have administrator rights on DATA2  An error occurred (1326)  
Logon failure:  Unknown user name or bad password".

The account I'm using is a domain administrator account which I have used to
successfully log into both nodes of this cluster.  DATA2, by the way, is the
passive node of the failover cluster.

When I run Cluster Administrator I can see both nodes and failover happens
fine whenever I have to reboot the active node.

I'm pulling my hair out on this one because I can't get past this point in
the install process.  Any ideas?