If you run the ACD/SMDR inspector or the forecast tool, and you see this: 

There are two things that are required to get inspectors to run when using IIS 7. 

If you are running IE8, lower the security settings to Medium.  Tools->Internet Options->Security tab

After that, you must edit C:\Windows\System32\inetsrv\config\applicationHost.config.  Under the <requestFiltering> tag, set all the file extensions to be allowed.  e.g.

<add fileExtension=".config" allowed="true" />

For more information please refer to Microsoft TechNet - http://technet.microsoft.com/en-us/library/cc754791(WS.10).aspx

Keywords: iis iis7 internet information services IIS 7