Installing PEAR with Plesk 8

[teknoledge]

I have a problem with configuring PEAR on my server.

Server is running on CentOS with PHP 4.3.9

Here is the PEAR configuration:
Configuration (channel pear.php.net):
=====================================
Auto-discover new Channels auto_discover <not set>
Default Channel default_channel pear.php.net
HTTP Proxy Server Address http_proxy <not set>
PEAR server [DEPRECATED] master_server pear.php.net
Default Channel Mirror preferred_mirror pear.php.net
Remote Configuration File remote_config <not set>
PEAR executables directory bin_dir /usr/bin
PEAR documentation directory doc_dir /usr/share/pear/docs
PHP extension directory ext_dir /usr/lib/php4
PEAR directory php_dir /usr/share/pear
PEAR Installer cache directory cache_dir /tmp/pear/cache
PEAR data directory data_dir /usr/share/pear/data
PEAR Installer download download_dir /usr/temp/download
directory
PHP CLI/CGI binary php_bin /usr/bin/php
PEAR Installer temp directory temp_dir /usr/temp
PEAR test directory test_dir /usr/share/pear/tests
Cache TimeToLive cache_ttl 3600
Preferred Package State preferred_state stable
Unix file mask umask 22
Debug Log Level verbose 1
PEAR password (for password <not set>
maintainers)
Signature Handling Program sig_bin /usr/bin/gpg
Signature Key Directory sig_keydir /etc/pearkeys
Signature Key Id sig_keyid <not set>
Package Signature Type sig_type gpg
PEAR username (for username <not set>
maintainers)
User Configuration File Filename /root/.pearrc
System Configuration File Filename /etc/pear.conf

I also added into the vhost.conf this:

<Directory /var/www/vhosts/serverinn.com/httpdocs>
php_admin_value open_basedir /var/www/vhosts/serverinn.com/httpdocs:/tmp:/usr/share/pear
</Directory>

I want to enable PEAR on all domains automatically but whatever I do it doesnt work. Does anyone have similar problem?

Thanks,
Milos