I have set up an eventlog sensor to check the application log for events from source backup. I have then simulated a failure to put an error in the event log of the target server. However, PRTG does not always register the event. I know the sesnor is configured correctly, as it works sometimes, but does not work all the time - often missing several events before finally catching one.
The target server is running 2008 R2 and the sensor is the WMI eventlog sensor.