Hi Tim,
Please check whether you have followed the steps to enable the PDF printing via WEBGUI, by following the steps from SAP note 771683 (belongs to BC-CCM-PRN-PC area). (there are only configuration steps, no SNOTE code necessary - most likely you have a system with SAP_BASIS > 6.40).
The WEBGUI note 1042424 tells more about the needs to have the correct configuration (made by note 771683).
Regards,
Cris