[otrs] PDF problem

Hi All, i am having this error on log: PDF support activated in SysConfig but cpan-module PDF::API2 isn't installed! Thu Mar 29 09:27:49 2007 error OTRS-CGI-10 Module 'PDF::API2' not found! otrs is installed in a freebsd box, who knows what port i need to solve this? Regards, Vince.