Syslog Report Problem

Syslog Report Problem

Dear All
 
I have configure my Cisco 2811 router to send syslog messages to my OPM. in live syslog viwer i can see a syslog relating to FAN Failure problem on my router but when using Report==>Syslog Event , no event is shown, do u have any idea about such problem, how can i solve the problem?
 
Regards

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