Error when you try to edit the content source schedule in Microsoft Office SharePoint Server 2007: "Access is denied"

I had this problem long time ago. I post here just in case someone has the same issue.

When you try to create a new schedule or change an existing schedule, you receive the error message "access is denied". Or in the environment with a dedicated search index server, open Centre Admin in the server which is not the search index server, clicking Search Settings in SSP, got IIS error HTTP 403.

To resolve this issue, please look at Microsoft knowledge base http://support.microsoft.com/kb/926959