I purchased adtrackz from the original website with 1 installation. And they didn't even respond or help me install anything... So I followed the instruction and installed it myself, everything went well except when I test my first link, it return me an error page... http://domain.com/go/go.php?c=google Internal Server Error The server encountered an internal error or misconfiguration and was unable to complete your request. Please contact the server administrator, firstname.lastname@example.org and inform them of the time the error occurred, and anything you might have done that may have caused the error. More information about this error may be available in the server error log. Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request. Apache/2.2.14 (Unix) mod_ssl/2.2.14 OpenSSL/0.9.8e-fips-rhel5 mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/22.214.171.12435 Server at domain.com Port 80 Does anyone who uses Adtrackz know what's wrong with it?? Thanks in advance guys.