Auth and Debian Squeeze

[Freddy Van Ingelgom <freddy.vaningelgom@xxxxxxxxxx>]

Hello,
I am new to this group, so sorry if I by mistake post to the wrong list!
My problem:
I use Apache2, PHP5 and MySql on Debian Squeeze. At least, I would like to.
This configuration was running perfectly with Lenny
Upgrade from Lenny to Squeeze was a mess, and I had to install my system 
from the bottom up.
My internal website uses Auth, PEAR is installed but I can not find 
Auth.php???
It shows up al being installed, but I can not find it on my system.
Is there some "install" to perform other than "apt-get install" from the 
regular depositories?
Thanks for your help!
Freddy