shell script does not run in Nagios

I have a following issue with Nagios. Here is my command definition:

define command{

command_name    dlg_notifications
command_line    /usr/local/nagios/libexec/nagios-msg-broker.sh
}

and service definition

define service{

use mypc service_description dlg_Alerts_notifications check_command dlg_notifications max_check_attempts 1 retain_status_information 0 retain_nonstatus_information 0 }

/bin/bash /usr/local/nagios/libexec/nagios-msg-broker.sh runs fine manually.

I can run this script manually, but service defined above can’t run it. Here are the ownership/permissions of the script:

perfserver-10:/usr/local/nagios/libexec$ ls -l nagios-msg-broker.sh -rwxrwxrwx 1 nagios nagcmd 149 Mar 30 10:04 nagios-msg-broker.sh

Thanks.