Even if you add meta tags with EXPIRES and NON-CACHE, the page is still cached with IE 5.
I found following text from Microsoft:
A page that Internet Explorer 5 is browsing is not cached until half of the 64 KB buffer is filled. Usually, metatags are inserted in the header section of an HTML document, which appears at the beginning of the document. When the HTML code is parsed, it is read from top to bottom. When the <HTTP-EQUIV="PRAGMA" CONTENT="NO-CACHE"> metatag is read, Internet Explorer looks for the existence of the page in cache at that exact moment. If it is there, it is removed.
The solutions is to place another header section at the end of the HTML document.
< META HTTP-EQUIV="REFRESH" CONTENT="5">
< TITLE> Pragma No-cache < /TITLE>
This is an example of where to place the second header section
so that the "Pragama, No-Cache" metatag will work as it is supposed to.
< META HTTP-EQUIV="PRAGMA" CONTENT="NO-CACHE">
This was first published in November 2000