[horde] Problems resolving localhost on Horde2

[Marco Maiani]

I try to explain better my problem: when I go to 
"http://myserver/horde/index.php" I saw only the icons of application 
and a white page. When I click on the icons I receive this message
"The logon has been refused during the attempt of logon to localhost"
Only "mail" icon woks well and open the page assciated with the link: 
then I put my name and passwd and I logon. After that if I click on 
horde icon I can open the horde page and I can see how many messages I 
have and I can only create and send new e-mails. All others buttons 
(Mail, Calendar and new event)give me the messages "The logon has been 
refused during the attempt of logon to localhost"

I suppose that I have these messages because horde  program doesn't 
resolve 'localhost' to my server address but I'm not sure about it and I 
don't know in what file I need to set it.

I thank everybody for any suggestion about it

Marco