With the release of MOM 2005 SP1, we were no longer able to get the MOM 2005 SharePoint WebPart to work correctly. The first issue we ran into was just getting it installed. The installation failed unless we included the correct SharePoint Virtual Server information which for us is highlighted below. The Virtual Server Physical Location defaulted correctly.
Now we could add the WebPart to the Sharepoint (or WSS) site, but it would error out when we attempted to configure it by pressing the “Show MOM 2005 Property ToolPane” button. With significant help from Microsoft we made the following change.
Edit the config.web file for SharePoint (for us located under C:\Inetpub\SharePoint), to add the following information just after the </configSections> tag:
Next do an IISreset.
You may also need to copy the microsoft.web.ui.webcontrols.dll file to the SharePoint bin directory (for us it was C:\inetpub\SharePoint\bin). After this we were able to configure the WebPart!