Having problem ruuning it via nrpe

Hi,

Can you please help me as it does not run when run via NRPE. Runs fine locally.
Can you please help me resolve ASAP??

When run via NRPE
===================
[root@viz-nagios-server-sc ~]# /usr/local/nagios/libexec/check_nrpe -H 172.16.66.205 -c check_disk_io
I/O UNKNOWN Unable to save current stats for later usage

When run Locally
======================
[root@viz-nagios-server-sc ~]# /usr/local/nagios/libexec/check_mio -d sda -w 200,2000,52428800,52428800 -c 400,4000,104857600,104857600
I/O OK |req_read=0r/s;;; req_write=2r/s;;; await=3ms;;; data_read=26b/s;;; data_write=24100b/s;;;

Reagards,
fm2ahmed