error to monitoring RED device with nagios

hi,

can you give me all steps for configurate nagios to monitor red device please?

I installed the plugin "check_asg_red_state_v1.1.zip " but not work! error message is: RED CRITICAL - unable to connect to firewall or file not found

what does it mean?
help me please, i really need to monitor my red devices astaro.: (

thanks a lot