Netscape won't print page after PHP retrieves from db

Hello, I have scoured the web regarding the Header function. I am using header ("cache-control: public"); so that the users (who are on netscape) would be able to print their screens. PHP retrieves data builds a table displays info via html When attempting to print, the page from the printer says This document resulted from a POST operation and has expired from the cache... the thing is, there are 20+ variables coming through from page to page. It's not practical to put them into the url. How can I get Netscape 4.7x to print these pages, which are showing up on the screen just fine? thanks -- Paul Fernandez Webmaster Structural GenomiX, Inc.