Problem with Nagios + gnokii

[Rituraj Buddhisagar]

Hi,

I am able to send messages with gnokii but when i plugin the gnokii 
command in Nagios; sms just does not come. How do I debug this?
Has anyone here worked on Nagios + Gnokii?

Please let me know any pointers.

I have followed this link.
http://www.nagios.org/faqs/viewfaq.php?faq_id=220&expand=false&showdesc=false
----------------------
send sms example script:
----------------------------------
#!/bin/sh
#
# Gnokii Plugin script
# (c) Horst venzke
# v 0.1 - 17.01.2004

mess=$2
number=$1
echo $mess | gnokii --sendsms $number
----------------------------

I am able to run the above shell script as nagios user(with sudo). So I 
do not know why nagios is not sending sms when it calls this script :(

Anyone had same problem???

Thanks,
Rituraj