A bunch of questions to point us in the right direction...
1.) Where does the data/report footer end on the last page of the report - is it near the bottom of the page, or much higher?
2.) Is it in the same location on both the Crystal Reports and Crystal Enterprise Viewer?
3.) Are you printining to the same printer from both the Crystal Reports and Crystal Enterprise Viewer?
4.) Which Crystal Enterprise Viewer are you using (HTML, ActiveX, Java, etc)?
5.) What are the print driver settings for the printer(s) in question - driver version, page settings, margins, form-feed, special characters, etc....?