First of all, you don't "save" pictures using Lightroom. Any adjustments you make to the images are cumulatively stored in the catalog. The underlying original photo is not modified.
When I want to print an image I go to the print module with the image I want to print highlighted. In the print module I either choose a print template or set up the print job using the Lightroom settings as well as settings in my printer driver. When everything has been set appropriately I print.
Do you mean that when you print an image it is blank, or is the print template blank? Do you have an image Highlighted? Please provide more detail.