[horde] Problem with pear

[Nusa]

I use php4. I don't understand my problem

Horde Versions
Horde: 2.2.5 
PHP Version
View phpinfo() screen 
PHP Version: 4.1.2 
PHP Major Version: 4.1 
PHP Minor Version: 2 
PHP Version Classification: release 
You are running a supported version of PHP.
PHP Module Capabilities
DOM XML Support: Yes 
FTP Support: Yes 
Gettext Support: Yes 
IMAP Support: Yes 
LDAP Support: Yes 
MCAL Support: Yes 
Mcrypt Support: Yes 
MySQL Support: Yes 
PostgreSQL Support: Yes 
XML Support: Yes 
Miscellaneous PHP Settings
magic_quotes_runtime disabled: Yes 
file_uploads enabled: Yes 
safe_mode disabled: Yes 
trans_sid disabled: Yes 
PHP Sessions
Session counter: 1 
To unregister the session: click here 
PEAR
PEAR - Yes 
Recent PEAR - Yes 
Mail - Yes 
Log - Yes 
DB - Yes 
Net_Socket - Yes 
Date - Yes 
HTML_Common/HTML_Select - Yes