After pressing the login button I found these error entries in the /var/log/messages file..
Dec 29 18:21:52 ns1 kernel: audit(1104369712.843:0): avc: denied { read
} for pid=4597 exe=/var/www/cgi-bin/qmailadmin name=cdb dev=dm-0
ino=1258729 scontext=root:system_r:httpd_sys_script_t
tcontext=root:object_r:var_t tclass=file
Is qmailadmin running as the vpopmail user? It sounds like it doesn't have access to the /var/qmail/users/cdb file.
Are you running SELinux? Can you disable it for httpd and/or qmailadmin? It sounds like you've tightened security too much.
-- Tom Collins - [EMAIL PROTECTED] QmailAdmin: http://qmailadmin.sf.net/ Vpopmail: http://vpopmail.sf.net/ Info on the Sniffter hand-held Network Tester: http://sniffter.com/