Why won't my entire document print on Pages?

I am currently creating a wedding invitation on Pages, on the print preview it looks fine, I print it on a 5 X 7 card (the same size I have the document as) And the bottom half inch of it is cut off, one two different documents, and I printed it on an 8.5 X 11 piece of paper to see if it was my printer, but the same spot was missing on there. I need to print these out ASAP! How can I fix this? Why isn't it working??