Sharepoint Sharedservices

Hello,

I just finished installing MOSS 2007, completed web application setup, created SSP and a collaboration portal. All of these was done successfully. But now when I try to access the SharedServices page or anyone of my sites created the authentication fails - HTTP:401.1 error. Tried using different logins with administrative previleges but no luck....How do I access my Sharedservice site? Please help...

Thanks,
Devi.