ProxyTimeout

I'm using Apache Proxy (Apache 2.2.3) with mongrel_cluster and in
production, I have a report that is hitting the timeout limit
(sometimes, not always).

It seems to limit at 2 minutes.

According to Apache documentation, it should be 300 (which I presume is
seconds) and so in my httpd.conf, I inserted 'ProxyTimeout 600' and
restarted Apache but it doesn't seem to have any effect.

Anyone with suggestions? (This is production and I am using backgroundrb
in development so I could probably move this report to background but
that doesn't help with current production).

Craig