Solaris9, bind9, chroot, "user 'named' unknown"

I'm trying to get Bind9 installed under chroot, but I'm running into an
odd problem with "user 'named' unknown".

I have everything in the /opt/named/ directory for the bind binary. I
can run it just find w/out the -u named. I have only the named user
within /opt/named/etc/passwd, /opt/named/etc/group and
/opt/named/etc/shadow with those files with the exact same permissions
as the ones in /etc.

I run with the command: chroot /opt/named sbin/named -u named -c
etc/named.conf
Error: named: user 'named' unknown.

It works w/out using chroot (ie: using /etc/ files); it works in chroot
w/out using -u named. But I can't seem to get it working under the
named user while under chroot.

Any ideas?

Thanks much
philip