[mrtg] SQUID errors

[Zeeshan Ahmed]

Dear all i am trying my best to monitor the SQUID stats, now i am taking help from http://howto.aphroland.de/HOWTO/MRTG/SquidMonitoringWithMRTG.

when i use the given cfg file from site it gives fowllowing errors

Unknown SNMP var cacheRequestByteRatio.5
 at /usr/bin/mrtg line 1491
Unknown SNMP var cacheRequestByteRatio.5
 at /usr/bin/mrtg line 1491
WARNING: Expected a number but got ''
WARNING: Expected a number but got ''


what else do i need with it.
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