question about Pear Auth and Pear MDB2

Hi, I'm a bit of a newbie at PHP and programming in general. Reading a PHP book by Larry Ullman, I was given instructions to install Pear Auth package and also Pear DB. As the Pear website said that DB has been deprecated in favor of MDB2, I installed this latter package. However, I am getting this error message when I require Auth.php... *Fatal error*: Class 'DB' not found in * /Users/michaelmitchell/pear/share/pear/Auth/Container/DB.php* on line *150* * * I'm not sure if this means I have done something wrong (if so, what?) or if this is somehow indicating that the Auth package is referring to the deprecated Pear DB package? or something else Thank you if you can help. * *