[users@httpd] mod_expires not working

["Gregor Schneider" <rc46fi@xxxxxxxxxxxxxx>]

hi guys,

I'm getting nuts here. This is what i have:

Apache HTTPD 2.0.48, Suse 9 something, Tomcat 5.0.28 working together with Apache HTTPD via mod_jk.

I have loaded and included both mod_headers and mod_expires (verified via https:/.../server-info), however, something puzzels me here:

First, I'm attaching my mod_headers.conf and mod_expires.conf:

mod_headers.conf:

      1 <IfModule mod_headers.c>
      2    Header unset Pragma
      3    Header set Connection: close env=object_is_pdf
      4    Header set ServerTokens MIN
      5    Header set Cache-Control "public,must-revalidate"
      6 </IfModule>

mod_expires.conf:

      1 <IfModule mod_expires.c>
      2         ExpiresActive On
      3         ExpiresDefault "now plus 10 seconds"
      4         ExpiresByType image/gif "now plus 3 months"
      5         ExpiresByType image/jpeg "now plus 3 months"
      6         ExpiresByType text/html "now plus 3 months"
      7         ExpiresByType text/xml "now plus 3 months"
      8         ExpiresByType text/_javascript_ "now plus 3 months"
      9         ExpiresByType application/pdf "now plus 3 months"
     10 </IfModule>

Line 3 is to work around the IE-bug that you cannot download f.e. pdf's via SSL, the mod_setenvif.conf is missing here, but this is not the point.

I would expect that I'm getting a response-header saying something like

Expires: Thu, 01 Nov 2006 22:00:00 CET

However, what's coming back is   "Expires: Thu, 01 Jan 1970 01:00:00 CET".

Since we have not implemented a form-based SSO between Apache HTTPD and Tomcat, we do have to serve our static HTML-content via Tomcat, and I can see that this header is definately created by Tomcat. When I go directly to Tomcat via 
https://myhost:8080/somehtml.html, I get exactly this header, too.

Now here's my question:

Why does mod_headers not seem to work here? What am I getting wrong?
Please note that I'm quite a newbie to Apache HTTPD and Tomcat, so I might ask some dumb questions...

Any hints are greatly appreciated!

Cheers & TIA!

Gregor 
-- 
what's puzzlin' you, is the nature of my game