Squid dstdom_regex not working

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http://serverfault.com – I want to deny all URL beginning by iso, in squid 3.2.3 So, I've put in squid.conf: acl torrent_sites dstdom_regex -i iso acl music_sites dstdom_regex -i music and my http control like: http_access allow localhost http_access allow localnetp1 http_access deny torrent_sites localnetp1 http_access deny music_sites http_access deny ftp_request http_access deny localnetp1 norm_conn http_access deny all but i can enter to the page isohunt.com, why? (HowTos)