I am trying to shutdown one of my database on which Oracle Retail application is running.but oracle not recognising this command.it is giving following error.

[oracle@ssipl-srvr-030 ~]$ export ORACLE_HOME=/u01/app/oracle/product/9.2.0
[oracle@ssipl-srvr-030 ~]$ export ORACLE_SID=RWMSLDB
[oracle@ssipl-srvr-030 ~]$ sqlplus "/ as sysdba"

SQL*Plus: Release 8.0.6.0.0 - Production on Tue Aug 26 13:59:49 2008

(c) Copyright 1999 Oracle Corporation. All rights reserved.


Connected to:
Oracle9i Enterprise Edition Release 9.2.0.7.0 - Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.7.0 - Production

SQL> shutdown
unknown command "shutdown" - rest of line ignored.

I found one thing in this error that at the time of login oracle giving two different version.
1-SQL*Plus: Release 8.0.6.0.0
2-Oracle9i Enterprise Edition Release 9.2.0.7.0 - Production

When i checked listener it is showing this things:

[oracle@ssipl-srvr-030 ~]$ lsnrctl status LISTENER

LSNRCTL for Linux: Version 8.0.6.3.0 - Production on 26-AUG-2008 14:02:15

(c) Copyright 1999 Oracle Corporation. All rights reserved.

Connecting to (ADDRESS=(PROTOCOL=ipc)(KEY=PNPKEY))
TNS-12224: TNS:no listener
TNS-12541: TNS:no listener
TNS-12560: TNSrotocol adapter error
TNS-00511: No listener
Linux Error: 2: No such file or directory
Connecting to (ADDRESS=(PROTOCOL=tcp)(PORT=1521)(HOST=XXXXXXX))
TNS-12618: TNS:versions are incompatible
[oracle@ssipl-srvr-030 ~]$

Please tell me how i have to resolve this problem.