Failed to access IIS metabase

[Nixar]

Hello everybody,
When I try to access to an .aspx page, the server answers me "Failed to

access IIS metabase." with an URL to support.microsoft.com website,
which explain metaacl modifications
(http://support.microsoft.com/?kbid=267904). The command line
configuration given seems not working properly, aspnet_regiis is not
recognizing it.

Could you help me? Any idea?
I'm new in asp.net technology, so I need a lot of help !

Thanks a lot.

Nicolas