Checking ISAPI Filter Status (IIS 6.0)
When you add an ISAPI filter to a site on IIS 6.0, the Status column in the list of filters is empty. Until a request is made for the site and an attempt is made to load the filter, the status of the filter is not known. After the request is made, the status of the filter is displayed either as a red arrow if the filter did not load or as a green arrow if the filter loaded successfully.
This behavior is different from the behavior in IIS 5.0, where the filter was loaded dynamically as soon as it was added to the site, regardless of whether a request was made to the site.
Important You must be a member of the Administrators group on the local computer to perform the following procedure or procedures. As a security best practice, log on to your computer by using an account that is not in the Administrators group, and then use the runas command to run IIS Manager as an administrator. At a command prompt, type runas /user:Administrative_AccountName "mmc %systemroot%\system32\inetsrv\iis.msc".
To check the ISAPI filter status