[horde] Can't login to horde

[Axel]

Hello

I have installed horde on a Windows environnement (Apache 2.0.58 + PHP 
4.4.4 + MySQL v5.0.28).

I'm trying to have the users authenticate against the horde_users table, 
I used the script.initial_horde_user.sql script in order to create the 
'admin' user.
During the initial configuration of Horde, I choosed the SQL 
authentication mode ( I configured defaults in Database tab). Generating 
the configuration seems to perform well, but I can't login. Maybe I 
coose the wrong encryption method (crypt, sha, plain, and so on...) ? 
Which one should I chose ?

What could be the problem, or how could I identify it ?

Thanks in advance.

Axel