[Serusers] serweb : error Undefined class name 'errorhandler' in application_layer/page_co

[Americania .it]

I'm trying to install serweb on Linux Suse 10 with apache2 , php , PEAR , 
PECL Runkit installed but when I call the page

http://host_name/serweb/user/index.php

I get the following error :

Fatal error: Undefined class name 'errorhandler'  in 
/srv/www/htdocs/serweb/application_layer/page_controler.php on line 102

What can I do ?

I've got crazy trying to understand what is wrong ...!



Thanks