Final stage of getting MRTG working with Nagios v2

[xmanhosting]

Hello,
 
I have been fluffing around with Nagios for a couple of weeks, and have
nearly finally nailed it.
 
I just have one thing to go.
 
I am trying to get MRTG to work with Nagios.
 
I have got MRGT working locally on my machine , and can see it working by
going to these 2 sites  (locally)  in a browser:
 
file:///usr/local/mrtg-2/share/mrtg2/icons/index.html and 
 
file:///usr/local/mrtg-2/share/mrtg2/icons/localhost_2.html
 
I followed the tutorial below to set up my router with Nagios:
 
http://www.thegeekstuff.com/2008/11/how-to-monitor-network-switch-and-ports-
using-nagios/
 
however I am yet to get MRTG working with Nagios:
 
PING OK 11-14-2009 13:13:56 21d 16h 10m 13s 1/3 PING OK - Packet loss = 0%,
RTA = 1.38 ms  
Port 1 Bandwidth Usage UNKNOWN 11-14-2009 13:09:49 21d 16h 8m 43s 3/3
check_mrtgtraf: Unable to open MRTG log file  
Port 1 Link Status OK 11-14-2009 13:11:29 12d 22h 37m 5s 1/3 SNMP OK - up(1)

Uptime OK 11-14-2009 13:10:29 12d 22h 27m 57s 1/3 SNMP OK - Timeticks:
(152738042) 17 days, 16:16:20.42
 
My switch.cfg currently has the following:
 
# Monitor bandwidth via MRTG logs
define service{
use     generic-service ; Inherit values from a template
host_name    Billion
service_description   Port 1 Bandwidth Usage
check_command
check_local_mrtgtraf!/usr/local/mrtg-2/share/mrtg2/icons/localhost2.log!AVG!
1000000,1000000!5000000,5000000!10
}
 
	
My localhost2.log is at the location above:
/usr/local/mrtg-2/share/mrtg2/icons/localhost2.log ,however I still must
have something wrong for it to not work.
 
When I run: /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
, it says: "Things look okay - No serious problems were detected during the
pre-flight check"
 
When I run: /usr/local/mrtg-2/bin/mrtg /home/mrtg/cfg/mrtg.cfg , it says: 
 
-----------------------------------------------------------------------
ERROR: Mrtg will most likely not work properly when the environment
       variable LANG is set to UTF-8. Please run mrtg in an environment
       where this is not the case. Try the following command to start:
 
       env LANG=C /usr/local/mrtg-2/bin/mrtg /home/mrtg/cfg/mrtg.cfg 
----------------------------------------------------------------------- 
 
When I run: env LANG=C /usr/local/mrtg-2/bin/mrtg /home/mrtg/cfg/mrtg.cfg  ,
there are no errors. 
 
Does anyone know what I am still doing wrong
 
Thanks for any help,
 
Kind regards,
Anthony 
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