Problem to run createtables.php of DB_DataObject package

Hello, I send you this email because i have a big problem with DB_DataObject package. When i try to run the createtables.php script in order to create php classes with my db tables, i have the following error : DB_DataObject Error: DB Error: not found It's very strange because when i use the same dsn mysql://root@localhost/biblog with DB package it works perfectly. I don't use the same configuration that is used in DB_DataObjects examples. I work under Windows with an EasyPHP-like server : wamp. My PEAR directory is C:/Program Files/wamp/php/PEAR. Here is my ini file used with DB_DataObjects : [DB_DataObject] database => mysql://root@localhost/biblog schema_location => C:\Program Files\wamp\www\BIBlog\DataObjects class_location => C:\Program Files\wamp\www\BIBlog\DataObjects require_prefix => DataObjects/ class_prefix => DataObjects_ I don't understand why it don't work !! I have created all directories and i have done all that is indicated in DB_DataObject documentation. Please help me if you can, cause i really want to use this package. Thanks, N.Moyroud