mod_expires working correctly?

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When I use a server header checker tool ( ) to
check the web pages I get this message below.  Does that look OK? Does it
have to validate? Thanks.  The other images and .css stylesheet referenced
from the page all Validate and have Last-Modified information in addition to
Cache-control and Expires information.
Date Thu, 20 Apr 2006 01:45:15 GMT
Expires 5 weeks 6 days ago (Thu, 09 Mar 2006 01:48:28 GMT)
Cache-Control max-age=-3628607
Last-Modified -
ETag -
Content-Length - (actual size: 6107)
Server Apache/1.3.34 (Unix) mod_fastcgi/2.4.2 mod_auth_passthrough/1.8
mod_log_bytes/1.2 mod_bwlimited/1.4 FrontPage/ mod_ssl/2.8.25
OpenSSL/0.9.7a PHP-CGI/0.1b

This object has been deliberately marked stale. It doesn't have a validator
present. It doesn't have a Content-Length header present, so it can't be
used in a HTTP/1.0 persistent connection. The clock on this Web server
appears to be set incorrectly; this can cause problems when calculating


This is the code I am using in .htaccess:

ExpiresActive On
# Expire .gif's 1 month from when they're accessed
ExpiresByType image/gif A2592000
# Expire everything else 1 day from when it's last modified
ExpiresDefault "modification plus 1 day"


Dan V.

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