If you didn't choose something else logging should be done to 
/tmp/horde.org at a level that includes failed logins. You can change 
it by editing $conf['log'] in Horde's conf.php (or using the admin 
configuration interface if you go back to it using a default conf file).

Having (received help from here and) managed to install Horde Group, 
having sucessfully run /horde/test.php and verified that PHP sessions 
work and can be unregistred, having verified that nothing is written 
to the PHPlog and error_reporting set to E_ALL, having checked in 
mySQL that horde.user_table contain a single line (the administrative 
user, and (presumably) encrypted password) then finally I call 
/horde/.   I'm redirected to the login.php page. I use the username 
and password I gave to the setup.php script, but I'm thrown right back 
to the login.php page.



The Apache logs shows no errors, and the access_log shows a GET on 
/horde, a GET on /horde/login.php, then a POST to /horde/login.php, a 
GET on /horde/index.php, before we get the net GET on /horde/login.php.



I've checked the FAQ on login failure and believe I've tried 
everything mentioned there.  Tried using both Firefox and Explorer 
(from XP).  Horde running on PHP Version: 5.1.6, mySQL 5.0.27, NetBSD 
3.0.



I'm out of ideas and suggestinos are mose welcome.  For example: How 
to turn on logging in Horde (grep'ing for "log" in horde/docs doesn't 
turn up anything interesting).



I hope this isn't trivial, and sorry if this is.  But when you're 
stuck, you're stuck.