If you are not in the USA and your computer's regional settings are set for something other than English (United States) you most likely will experience problems printing and previewing printed cards and envelopes. (This is the case for most versions of this program.)
You need to adjust your computer's regional settings to English (United States).
- Go into your Windows Control Panel, and open the Regional and Language Settings window.
- In the Standards and Format window, select English (United States) from the drop down menu and click OK.