[horde] stupid starter problem

[Ulrich Wisser]

Hello,

I installed horde and imp horde/test.php tells me that
everything is like it should and horde/imp/test.php can
access my imap server (and shows no error messages either).

When I access /horde in my webbrowser the login screen is
shown. But I am unable to login. Whatever username and
password I use nothing works.

Could please someone give me a hint how to configure Horde
for the login?

Thanks

Ulrich