Config response headers for Apache web server on AS/400

Hi all,
We run Apache/Tomcat on AS/400 and have a small problem: All JavaScript (.js) 
and CSS files are being cashed on the client PC and in order to apply any mods 
to those files we have to rename them (which is very painful process). I tried 
to configure HTTP Responses to instruct browser to trash those files if new 
version is found (using *ADMIN console), but no success so far.
 
Here the code from httpd.conf that was generated by *ADMIN service:
 
ExpiresActive on                                                     
ExpiresDefault "modification plus 0 seconds"                         
ExpiresByType application/x-javascript "modification plus 0 seconds" 
ExpiresByType text/css "modification plus 0 seconds"                 
Header Set ExpiresActive on                               
 
When I run the same Apache/Tomcat on PC with default config - no cashing is 
done on client side.
Appreciate your help,


Alex Pinsky
Aeropostale, Inc.