[ DB ] Fatal error: Class db_error: Cannot inherit from undefined class pear_error on line 622

my system : W2K + apache 2.0.46 + PHP 4.3.3RC4 + PEAR last week i used PEAR without any problem. Since yesterday I don't know why but I get an error message (look at the title) while reunning this easy script : <?PHP require_once 'DB.php'; ?> my php.ini is well called (verifyed with phpinfo) and has a usually good include_path (include_path = ".;D:\server\php\PEAR") DB.php is well called by my script (no stream error) and PEAR.php called by DB.php don't show any stream error. But DB.php is unable to look inside PEAR.php or it should see the pear_error class it wants to extends. The Solution i find is : _I do an ini_set("include_path", "D:\server\php\PEAR"); before my require_once _OR I change DB.php : require_once('PEAR.php'); on line 25 INTO require_once('D:\server\php\PEAR\PEAR.php'); _OR amazingly I change the php.ini : include_path = ".;D:\server\php\PEAR" INTO include_path = "D:\server\php\PEAR;.") I really don't know what has been modified to oblige me to modify the ini or my script. I hope it will help some guy.