ORA-12546: TNS:permission denied

< ^ > P N |<>|^_>< --- | ~ ...Help

OS: CentOs4.7
Oracle: 9.2.0.4.0
ruby: ruby 1.8.7

I'm trying install ruby & dbi & oci8

root have to connect sqlplus for oci8

oracle user connect sqlplus but root not

[root]# sqlplus user/pass

SQL*Plus: Release 9.2.0.4.0 - Production on Wed Feb 18 10:03:22 2009

Copyright (c) 1982, 2002, Oracle Corporation.  All rights reserved.

ERROR:
ORA-12546: TNS:permission denied

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