First, try to create a PDF instead of printing and see if the PDF contains anything. The logic behind printing and creating a PDF is exactly the same. If the PDF is empty, so will be the printout.
Check if your lines are not of width 0.00 which might print as (almost) invisible on some printer.
Another possibility is that white lines are printed. Check if the preference "Graphics View" - "Auto correct black and white colors" is checked.
Finally, you might want to submit the file to us for testing (by e-mail or through our bug tracker at: http://www.ribbonsoft.com/bugtracker/