hai friends,
while i try to connect from my client machine through os authentication using the following steps
oracle8.1.6
windows nt
1. in init.ora file i changed remote_login_passwordfile=exclusive
os_authent_prefix="ops$"
1.both in my client and server machine i have the same username and password
2.create user ops$ identified externally
3.grant connect toops$
4.alter user ops$
default tablespace
temporary tablespace
quota 10 m on
quota 10 m on
5. i created a service name from my client machine as dba
6. i sqlnet.ora file sqlnet.authentication_service=(nts)
7. connect /@dba

still i am getting an error
err-01004:default username feature not supported;logon denied

please help me da!!!!!!!!!!!