Executing Page not populated in IISState Log?

I have some IISState logs that I am trying to analyze and the Executing Page
field is always 'Unable to locate ASP page'. Is there something I can do to
fix this issue? I am trying to diagnose why this IIS Server is taking up 100
percent of the CPU from time to time.

I would post the log but I get an error message about the post being too
long...