Installation problem

[Jean-Michel POURE]

Dear all,

Pardon my ignorance, but I have problems configuring Horde 3.0 + 
Chora 2.0 Versions:

1) I can view test.php (everything is installed) and refresh counts
2) I created a database under PostgreSQL with user/password and configured 
config/horde.php.
3) How do I add a user in table_users? Can I do it without loggin in Horde?
4) Because I was unsuccessful, I switched to '' in preference and did not 
succeed to log in. "Failed login for root from 192.168.1.102 ..."

Can anyone help me?
Cheers, Jean-Michel POURE