http://www.activexperts.com/support/activmonitor/online/ii6metabase/

How to install the IIS 6 Metabase Compatibility components on IIS 7
The ActiveXperts Network Monitor Web Configurator requires that the Windows Server 2008-based or Windows Vista-based computer where you are configuring a Virtual Directory has the IIS 6 Metabase Compatibility components installed.

To install the IIS 6.0 Management Compatibility Components by using the Windows Server 2008 Server Manager

Click Start, click Administrative Tools and then Server Manager.
In the left navigation pane, expand Roles, and then right-click Web Server (IIS) and select Add Role Services.
On the Select Role Services pane, scroll down to IIS 6 Management Compatibility.
Select the check boxes for IIS 6 Metabase Compatibility and IIS 6 Management Console.
Click Next from the Select Role Services pane, and then click Install at the Confirm Installations Selections pane.
Click Close to leave the Add Role Services wizard.
To install the IIS 6.0 Management Compatibility Components by using the Windows Vista Control Panel

Click Start, click Control Panel, click Programs and Features, and then click Turn Windows features on or off.
Open Internet Information Services.
Open Web Management Tools.
Open IIS 6.0 Management Compatibility.
Select the check boxes for IIS 6 Metabase and IIS 6 configuration compatibility and IIS 6 Management Console.
Click OK.