Error 404 w/ OWA & MS Security ToolKit

After installing the MS Security Took Kit on my Win 2k Exchange Server, Outlook Web Access now returns “The page you are looking for might have been removed, had its name changed, or is temporarily unavailableHTTP 404 – File not found Internet Information Services” whenever I open the forwarded portion of an email within an email that is represented as an attachment. Anybody have an idea of what was tighten up on the IIS server used by Exhange 2K to hide the attachmentment of OWA.