Starting Oracle-Xe on Linux fedora core 5

Dear fourm members,
I had Installed Oracle Xe on linux fedora core 5 and configure it.
When i try to start the oracle Xe server I get the follwing error.
# /etc/init.d/oracle-xe start
Starting Oracle Net Listener.
Starting Oracle Database 10g Express Edition Instance.
Failed to start Oracle Net Listener using /usr/lib/oracle/xe/app/oracle/product/10.2.0/server/bin/tnslsnr and Oracle Express Database using /usr/lib/oracle/xe/app/oracle/product/10.2.0/server/bin/sqlplus.
what can i do to start the service.

Failed To Start Oracle Net Listener

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Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost.localdomain)(PORT=1521)))
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SQL*Plus: Release 10.2.0.1.0 - Production on Mon Feb 5 09:03:29 2007
Copyright (c) 1982, 2005, Oracle. All rights reserved.
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