note 38630 added to function.require-once

can someone help me? I want to install mambo, but I have the following problem: Warning: main(../classes/database.php) [function.main]: failed to create stream: No such file or directory in ..../html/installation/install2.php on line 16 Fatal error: main() [function.main]: Failed opening required '../classes/database.php' (include_path='.:/usr/lib/php') in ...../installation/install2.php on line 16 what shall I do? ---- Manual Page -- http://www.php.net/manual/en/function.require-once.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+38630 Delete -- http://master.php.net/manage/user-notes.php?action=delete+38630&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+38630&report=yes Search -- http://master.php.net/manage/user-notes.php