[otrs] SMTP Sending error

Just got OTRS 3.03 setup from the RPM on Centos 5.5. Trying to get ANY mail sending option working, with no luck. The error when trying to relay via Google Apps (SMTPS) is: Software error: Can't locate object method "new" via package "Net::SMTP::SSL" at /opt/otrs//Kernel/System/Email/SMTPS.pm line 121. For help, please send mail to the webmaster (root@localhost), giving this error message and the time and date of the error. Does anyone have any suggestions? I've tried Sendmail as well, and got a similar but different error, about not finding the method "autoflush"