Probleme to install horde

[eticarot]

I'm trying to install horde on my webserver.

http://213.251.135.217/webmail/horde/test.php

I've this problem.

PEAR
PEAR - No
Check your PHP include_path setting to make sure it has the PEAR library
directory.
Recent PEAR - No
Mail - No
Log - No
DB - No
Net_Socket - No
Date - No
HTML_Common/HTML_Select - No


AND

http://213.251.135.217/webmail/horde/
Warning: main(): open_basedir restriction in effect. File(/usr/share/pear/PEAR.php) is not within the allowed path(s): (/home/httpd/vhosts/default/htdocs:/tmp) in /home/httpd/vhosts/default/htdocs/webmail/horde/lib/Registry.php on line 12


In my php.ini i've set
include_path = ".:/usr/share/pear"


How to resolve this problem ?