It's a known issue with Crystal Reports. Here is a link to the bug and a work around:

http://support.crystaldecisions.com/kbase/c2011099.asp

>hello all, i have created a line graph chart with crystal reports. in the design printer setup, i selected the proper printer and choose landscape. when i run the report it looks fine in the designer, but when i print the report it prints in portrait view and cuts off some of the graph. Why do my settings change, when I try to print the report? when i look in the designer, it still says landscape.