External script Permission denied

[bala384]

Hi... i create vnstat external script in zabbix ... i follow this link ( http://www.perehospital.cat/blog/how...th-with-zabbix ) whats my problem the script working ubuntu user no problem but root and centos user the same script not working ..coming this error > Received value [sh: /root/zabbix_total_month_bandwidth.sh: Permission denied] is not suitable for value type [Numeric (float)]