[horde] Horde (imp) not showing folders

[Fabio Ferrari]

Hello,

I have a problem about Horde and Imp.

I've configured Horde and Imp to access an imap server. The authentication
is OK, and the comunication between the horde server and the imap server
is OK. In fact, in the left side of the page I see the correct list of
folders.
But when I click on one folder (es.Inbox) in the main frame of the page,
it shows anything. Just a blank frame.

No errors are shown in horde.log and in httpd/error.log . My horde and php
versions are the standard ones of centos 5.5 (php 5.1.6 and horde
3.1.9-1).

Can someone help me?

Thanks in advance,

Fabio Ferrari