Cacheing

Even though I have the following META tags, I still have to manually refresh
my browser after updating the page in question.

<meta HTTP-EQUIV="Cache-Control" CONTENT="no-cache">
<meta HTTP-EQUIV="Pragma" CONTENT="no-cache">

So, it would seem that the page is being cached despite these tags. Any
other ideas about forcing current version to be shown. Or any reasons why
this doesn't seem to be effective. Maybe something else at our site is
cacheing pages?