Error connecting 10g DB through 9i client

I have one 10g database on a remote machine and I want to connect this database through 9i client.
Would some please tell me the procedure for connection.
Running netca didn't is not solving my problem.
Thanks,
Bikash

Thanks ...
Yes, I do have a valid netalias configured on the 9i client.
Result of tnsping against a remote 10g database is as below:
===========================================================
C:\oracle\ora902\bin>tnsping usunnbd24.us.oracle.com 10
TNS Ping Utility for 32-bit Windows: Version 9.2.0.1.0 - Production on 25-AUG-2
05 20:54:54
Copyright (c) 1997 Oracle Corporation. All rights reserved.
Used parameter files:
C:\oracle\ora902\network\admin\sqlnet.ora
Used HOSTNAME adapter to resolve the alias
Attempting to contact (DESCRIPTION=(CONNECT_DATA=(SID=*)(SERVICE_NAME=usunnbd24
us.oracle.com))(ADDRESS=(PROTOCOL=TCP)(HOST=usunnbd24.us.oracle.com)(PORT=1521)
OK (610 msec)
OK (610 msec)
OK (630 msec)
OK (590 msec)
OK (610 msec)
OK (610 msec)
OK (610 msec)
OK (590 msec)
OK (610 msec)
OK (610 msec)
===========================================================
I am trying to connect through sqlplus.
Hope I answered all your questions.Please let me know the worlaround needed.
Thanks,
-Bikash

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