Squid - Sarg and IP-Adress in Hostname

[sunghost]

Hello,
i setup on latest pfS latest Squid3-dev and latest Sarg. It seems to run well in transparent mode. In sarg i now see only ip-adresses and whould like to see the hostnames. After lot of time in searching i didnt find any helpfull. As far as i understand, sarg take the data from squid log so the option must be in squid, but i didnt find an option to resolve ip in hostname. I checked my dns and dns forwarder to and add first the 127.0.0.1 and then the external dns from my isp, as i found anywhere in the forum. but it doesnt solve my problem.

so i hope someone can help to solve this little problem ;)
thx