I turned on all the options for IIS AppPool recycling logging and recycled the app pool a few times and I am not seeing the events in the event log. I refreshed a few sections in the event log. Where are these being recorded? Windows 7.
Just to test, I did enabled same options for an app pool and imediately Microsoft-IIS-Configuration/Operational registered some events stating that there have been made some changes to the application pool.
Just to note, that log was already enabled, so make sure it's enabled before doing changes to app-pool