for PEAR experts! - unable to find class for driver mail !

[synfield]

I have downloaded code example from apress "web design solutions php mysql apache" book, which uses pear classes for DB Mail etc. have configured MySQL, apache 2, php 4.3 & tested sendmail on RH9.

They have all been configured seem to be working fine, however I get the above error message when trying to login, I know it's something to do with pear Mail.php class and $driver paramater which is passed in, how do I test the parameter that is being passed in.

Any help would be much appreciated

Cheers.

Synfield

[synfield]

What I should have said is "what is this parameter "$driver" where does this parameter come from and how do I change it?