[otrs] Help me on Generic agent

Hi list I have selected the 10 min time option in the Generic Agent Job's settings it should check every ten minutes the definite queue and if he finds the owner is root@localhost it should change it should change it to the appropriate owner (F.Y.I every time the customer opens a ticket the initial owner is root@localhost) Why the job is not executed every 10 minutes but only at the first time when i run it? Regards