Could not open required defaults file: /etc/nagios/mysql.cnf

My file is as follows:
[client]
user=myuser
password=mypassword

We are using NRPE to monitor this on a remote host. Maybe my command definition is wrong?

Remote mysql server (nrep.cfg):
command[check_mysql_replication_running]=/usr/lib64/nagios/plugins/pmp-check-mysql-replication-running
command[check_mysql_replication_delay]=/usr/lib64/nagios/plugins/pmp-check-mysql-replication-delay

Nagios server (commands)
define command {
command_name check-mysql-replication-running
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
}

define command {
command_name check-mysql-replication-delay
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
}

Nagios server (node)

define host{
use my-template
host_name myhostname
alias myhostname
address 1.1.1.1
}

define service{
use generic-service
host_name myhostname
service_description mysql replication status
check_command check-mysql-replication-running!check_mysql_replication_running
}

define service{
use generic-service
host_name myhostname
service_description mysql slave delay
check_command check-mysql-replication-delay!check_mysql_replication_delay
}