Apache mod_proxy issues

Hello

I'm trying to figure out if my simple mod_cache setup is working. I
compiled the mod_cache modules (mod_cache, mod_disk_cache and
mod_mem_cache) and put together a simple configuration. The server
starts up without a murmur, but I'm not sure that the caching is
actually taking place.

In my first test, I disabled the mem_cache by commenting it out in the
configuration, and wrapping its directives with an IfModule, like so:

<IfModule mod_mem_cache.c>
CacheIgnoreCacheControl On
CacheDefaultExpire 120
CacheEnable mem http://192.168.1.100:80/test
MCacheSize 32768
MCacheMaxObjectCount 100
MCacheMinObjectSize 1
MCacheMaxObjectSize 1048576
</IfModule>

My mod_disk_cache setup looks like this:

<IfModule mod_disk_cache.c>
CacheIgnoreCacheControl On
CacheDefaultExpire 300
CacheRoot /apprel/tmp/htcache
CacheEnable disk http://192.168.1.100:80/test
</IfModule>

The /apprel/tmp/htcache directory is available to the apache user. In
the htdocs/test directory I have a simple html page. When I make a
browser request to that directory, the page is loaded. I immediately
make a change to the page, and reload it in the browser. The new page
loads, despite the fact that the 2 minutes are far from up.

I get the same result when I switch to mod_mem_cache.

I can't seem to find anything wrong with my config (I tried some bogus
cach directives, and the server wouldn't start, so I know that the
mod_cache pieces are there).

Any help would be much appreciated.