SquidGuard not blocking Target Category

[rsaanon]

I am trying to block certain search engines, but SquidGuard doesn't block it for some reason.

Here are the relating config info from the SquidGuard config file:

# Restricted Search Engines
dest SearchEngines {
	domainlist SearchEngines/domains
	redirect http://192.168.100.10:80/sgerror.php?url=403%20&a=%a&n=%n&i=%i&s=%s&t=%t&u=%u
	log block.log
}

acl  {
	customACL  {
		pass !SearchEngines !BlockedGameSites !BlockedSites !AdSites !PornSites !NonUSGoogle FileExtensions all
		redirect http://192.168.100.10:80/sgerror.php?url=403%20&a=%a&n=%n&i=%i&s=%s&t=%t&u=%u
		log block.log
	}

The Target Category SearchEngines have contains the following domains:

yahoo.com www.search.yahoo.com www.yahoo.com www.ask.com www.search.aol.com www.wow.com www.webcrawler.com www.mywebsearch.com www.infospace.com www.info.com www.duckduckgo.com www.contenko.com www.dogpile.com www.alhea.com www.ixquick.com searchencrypt.com

Even with the configuration defined above, I am able to get to yahoo.com, for example.  There are no block entries in the block.log file.