Since you can print non secured site not sure if these will help.
Can you check with the Web Master of the Site. These pages may not be cached
therefore nor printable. Is there not a print command on the page?
What happens if you highlight the text, copy it and paste it to Notepad or
some other Text editor.
Java Programs Are Not Printed in Internet Explorer 5.5 or Later
Java programs may appear blank or empty (or may appear in the background
color) when you preview a Web page for printing, and may be blank when you
print them.
http://support.microsoft.com/?kbid=309349 (i. e. 5, 6. W2000 5/28/2003)
Print Preview Is Blank and You Cannot Print Pages from Internet Explorer
When you attempt to print a document from Microsoft Internet Explorer or
from Microsoft Outlook Express, you may experience the following behaviors:
It does not print. When you click Print Preview on the File menu, a blank
page is displayed.
http://support.microsoft.com/?kbid=312446 (i. e. 5. W98/ME/NT4/W2000
10/1/2002)