Gray Cloud

I have a server that is frequently alerting on Processor performance. I can
see a weeks worth of perf detail from the monitoring view. Where do I find a
similar report from the reporting view ? I am trying many of the canned
report templates and keep generating empty reports. I am using the windows OS
object for a specific server as my selected object. Other reports like top
objects seem to return data for the same range so I am confused as to why I
can't pull any data for this and many other reports. How do you determine
what objects are valid ? In other reports I use the suggested search items
and select from the returned list, and still get an empty report. Is there
somewhere I can find more info ?
Thanks