[mistwang]

Thank you for trying our product.
You need to define a FastCGI "External App" at either server level or virtual host level first, then add a "Fast CGI" context with "URI"=>"/rollcall/", "Fast CGI app"=>"your fast cgi responder".
Please take a look at
http://litespeedtech.com/docs/howto.html#extapp

Hope that answers your question.