Could You Help Me???? I would be very thankfull

I have used AdOX.catalog to view users of a database and their permissions on this database.
I have written the following code

private sub Form_Load()

dim conn as new ADODB.Connection
dim sec as new ADOX.Catalog

con.Open "Provider=MSDAORA.1;User ID=ers;Data Source=ers;Persist Security Info=False", "ers", "hugo"
set sec.ActiveConnection = conn

Dim Permission As RightsEnum
Permission = sec.Users(0).GetPermissions("Orders", adPermObjTable)

End Sub

Where 'Orders' is a table in the Oracle Database 'ers'
It doesn't matter whether the database is Oracle or Access because the error appeares in the two cases

The error which face me is as follows:
(Object or provider is not capable of performing requested operation.)

Your friend, Shihab