[otrs] mkStats.pl doesn't work

Has anyone experienced errors when they run the mkStats.pl script ? Here's the output support:/opt/otrs/bin # ./mkStats.pl Can't locate GD/Graph.pm in @INC (@INC contains: /opt/otrs/Kernel/cpan-lib /opt/otrs /usr/lib/perl5/5.8.1/i586-linux-thread-multi /usr/lib/perl5/5.8.1 /usr/lib/perl5/site_perl/5.8.1/i586-linux-thread-multi /usr/lib/perl5/site_perl/5.8.1 /usr/lib/perl5/site_perl /usr/lib/perl5/vendor_perl/5.8.1/i586-linux-thread-multi /usr/lib/perl5/vendor_perl/5.8.1 /usr/lib/perl5/vendor_perl .) at ./mkStats.pl line 37. BEGIN failed--compilation aborted at ./mkStats.pl line 37. P'kale Robinson MIS Director Southwest Hospital and Medical Center http://www.swhosp.org