[imp] Can't log in

[Tolga]

Hello,

I've been struggling to configure horde/imp for a while and the closest 
I got to reading my mail is the login page where I can't login because 
horde says my username and password are incorrect. Below is a line from 
horde.log:

Feb 11 19:40:53 HORDE [error] [horde] FAILED LOGIN for tolga 
[192.168.1.2] to Horde [pid 3066 on line 164 of 
"/usr/share/horde/login.php"]. I'm guessing it's the authentication 
backend (I set it /etc/passwd before) but I think I need to change it. 
How do I do that?

Regards,

/Tolga