Is there anyway to kill exim que in cron job?

[yaax]

I need to find a way to kill exim que automatcally every few hours in cron job.
Is there some binary command to kill exim que completely like I can do in WHM command 'Delete Mail Que' ?

I just need to automate this task.

[sawbuck]

http://faq.cpanel.net/list.cgi
/usr/local/cpanel/whostmgr/bin/whostmgr2 killeximq

[yaax]

http://faq.cpanel.net/list.cgi
/usr/local/cpanel/whostmgr/bin/whostmgr2 killeximq

Did not worked for me.
This comand just do nothinng - no result, que was not killed by this command.