[horde] Horde Administrator login failed

[Simon Gao]

Hi,

I am trying to set up horde/imp downloaded from CVS, but unable to login 
as the admin user I specified in /horde/config/conf.php. I choose to use 
mysql as backend for authentication.

Here is my question: What is this admin user? A user in /etc/password? 
or in the table of horde_users of horde database?

My environment is:

Redhat 8.0
Apache 2.0.43
php 4.3.0pre2

/horde/test.php runs fine and has not critical error.

Any help is appreciated.

Thanks.

Simon