Beginning with PEAR

Hi I'm just beginning using Pear and I cannot find any hint on how to get rid of this error : *Fatal error*: Undefined class name 'pear' in */var/virtual_www/libenti.com/ln.dev.libenti.com/htdocs/classes/CBDDUtilisateurs.php* on line *7* I just copied/pasted the "**Example 33-4. At last some real DataObject Code.. ****from url "http://pear.php.net/manual/en/package.database.db-dataobject.intro-purpose.php"... I feel like there's some "include" statement missing... I searched everywhere in the manual and with Google and found absolutely no hint. The only thing i know is that Pear is installed (in /usr/share/pear) and working. But I have no rights to see nor to access this directory on the LAMP server. Thanks for your help.