installing log class

hi there! i'm trying to use the php-package to build a dso-module of php for my apache-webserver. i want to install a php-based webmailer on this webserver. the webmailer has a test.php that show all options needed and everything is well except the installed pear-version. the test.php tells me that i have to install the 'log-class' in order to be able to use the mailer. well...i read a lot of documentation about that but i still don't get it going! i downloaded the lod-package and i untar-ed it into php/pear and manipulated the makefile so that these files would be installed to,if i install php (as a module!) it looked like everything would be installed,but the test.php told me it wasn't so. then i read something about installing the binaries before i install the package. i did that and if i entered pear --help then there were commands like login logout.i think this is what was missing,but if i compile the module then,again the test.php tells me the log class is missing (ok a bit late now,but the webmailer is horde/imp!) if anyone know how to do this,pleaze tell me,i'm at the end of my rope now... greetz dadirtyluk