[otrs] Installation problem on FreeBSD

Hello! I've tryd to install otrs on a FreeBSD server. On access to index.pl and installer.pl the following error message appears in error_log: Function not implemented at /opt/otrs//Kernel/System/Log.pm line 80. without the line Perlrequire /opt/otrs/scripts/apache-perl-startup.pl in httpd.conf the message is slightly different: Function not implemented at /opt/otrs/bin/cgi-bin/../../Kernel/System/Log.pm line 80. Installation-source: otrs-1.3.0-beta4.tar.gz Perl v5.8.5 Whats wrong? Cheers, Oskar