[Observium] using postfix_qshape

Hi everyone, can any body explain how to using postfix_qshape working with observium, i'm already setting and work install check-mk-agent on target server has i want to monitored. i'm already copy script from /observium_install_folder/scripts/agent-local/postfix_qshape to /usr/share/check-mk-agent/local. i test telnet port check-mk-agent service and get output : bla bla bla blabla bla bla blaMail queue is empty <<<job>>> <<<local>>> <<<postfix_qshape>>> incoming:0 active:0 deferred:0 hold:0 <<<logins>>> 2 Connection closed by foreign host.

but if i'm check to observium web gui no app shown for postfix_qshape please help to make postfix qshape work to our monitored server observium Best regards,Anja