Issues with Nagios NRPE monitoring (Return code of 127 is out of bounds - plugin may be missing)

Hello,

I'm at my wits' end trying to fix my Nagios server's issue. I've followed the NRPE documentation closely, but I'm still getting this same error:       (Return code of 127 is out of bounds - plugin may be missing) in the Nagios web service. When I run the command

/usr/local/nagios/libexec/check_nrpe -H 10.254.1.2 -c check_load

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from the terminal, I receive the expected output. Not so much with what's inside my configuration files.

My setup is a LAN virtualized using VMWare Workstation. The monitoring and monitored machines are connected through a LAN segment, both running the latest version of CentOS 6.

Config files in regards to NRPE are as follows:

linux.cfg

define host{
        use                     remote-linux-server            ; Name of host template to use
							; This host definition will inherit all variables that are defined
							; in (or inherited by) the linux-server host template definition.
        host_name               linux
        alias                   Linux Server
        address                 10.254.1.2
        }
define service{
        use                             generic-service         ; Name of service template to use
        host_name                       linux
        service_description             CPU Load
	check_command			check_nrpe!check_load
        }

define hostgroup{
        hostgroup_name  remote-linux-servers ; The name of the hostgroup
        alias           Remote Linux Servers ; Long name of the group
        members         linux     ; Comma separated list of hosts that belong to this group
        }


define service{
	use				generic-service
	host_name			linux
	service_description		Ping
	check_command			check_ping!100.0,20%!500.0,60%
	}

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commands.cfg

define command{
	command_name	check_nrpe
	command_line	USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
	}

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remote host side

/etc/xinetd.d/nrpe

service nrpe
{
       	flags           = REUSE
        socket_type     = stream    
	port		= 5666    
       	wait            = no
        user            = nagios
	group		= nagios
       	server          = /usr/local/nagios/bin/nrpe
        server_args     = -c /usr/local/nagios
 no
	only_from       = 10.254.1.1
}

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nrpe.cfg

log_facility=daemon

pid_file=/var/run/nrpe.pid

server_port=5666

nrpe_user=nagios

nrpe_group=nagios

allowed_hosts=127.0.0.1,10.254.1.1

dont_blame_nrpe=0

debug=0

command_timeout=60

connection_timeout=300

command[check_users]=/usr/local/nagios/libexec/check_users -w 5 -c 10
command[check_load]=/usr/local/nagios/libexec/check_load -w 15,10,5 -c 30,25,20
command[check_hda1]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/hda1
command[check_zombie_procs]=/usr/local/nagios/libexec/check_procs -w 5 -c 10 -s Z
command[check_total_procs]=/usr/local/nagios/libexec/check_procs -w 150 -c 200 

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