Internet Information Services 7.5 with ASP.NET 4.0 Application Right Configuration‏

Hi,

I am running IIS 7.5 on Windows 7 64 bit with AS.NET 4.0 on it. I have Orchard CMS in one application pool and simple 301 redirection (through web.config) in the other application pool:

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <system.webServer>
        <httpRedirect enabled="true" destination="http://isitin.net/" exactDestination="false" httpResponseStatus="Permanent" />
    </system.webServer>
</configuration>

_Both_ web sites keep logging constantly the following entries ( each ~30-60 minutes):

#Software: Microsoft Internet Information Services 7.5
#Version: 1.0

It seems that something wrong is going on as warming up took significant amount of time for the first visit after such event log.

Please note that recycling  is turned off, 32 bit applications are allowed and startMode="AlwaysRunning" is set  for Application Pool.  Any help are highly appreciated.