Help with CPU Check Thresholds

[Net Warrior]

This is how I configured the service, my aim is to get an alert when
the CPU load  ( uptime ) reaches 10% and a critical when there is a
20%

check_command                   check_nrpe!check_load!10,4,3!20,15,10
        flap_detection_enabled          0
        notifications_enabled           1
        notification_options            w,u,r,c
        notification_period             24x7
        check_period                    24x7
        check_interval                  1
        max_check_attempts              2
        first_notification_delay        0
        notification_interval           1
}

The problems is that I get WARN when the load is less than that:
WARNING - load average: 1.77, 1.94, 3.04
WARNING - load average: 2.11, 2.23, 3.45
WARNING - load average: 1.90, 3.59, 4.34
WARNING - load average: 5.65, 5.05, 4.86


Any help appreciated.
Thanks for your time and support.

------------------------------------------------------------------------------
Own the Future-Intel® Level Up Game Demo Contest 2013
Rise to greatness in Intel's independent game demo contest.
Compete for recognition, cash, and the chance to get your game 
on Steam. $5K grand prize plus 10 genre and skill prizes. 
Submit your demo by 6/6/13. http://p.sf.net/sfu/intel_levelupd2d
_______________________________________________
Nagios-users mailing list
Nagios-users at lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/nagios-users
::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. 
::: Messages without supporting info will risk being sent to /dev/null