Page Not found error

Hi all can anyone please help us in our problem.We are having a IIS5 in
windows 2000 advance server .Having enbled only the annonymous authentication
it gives Unauthorized access.When enable the integrated windows
aauthentication it gives the Page cannot be displayed error.

Please help us how to solve the issue.

Truoubleshooting Done till now:
1.) IIS asp file register done
2.) checked the local security policy for the user level access for iusr &
iwam
3.) reinstalled IIS itself
4.) DTC service & all the other related service are ON
5.) Deleted the COM application packages & recreated it also through
rundll32 wamreg.dll, CreateIISPackage