Oracle Database Express Edition (XE)

hello

I just installed Oracle XE and did the configuration. the database starts and I can do a
telnet localhost 1521
and I get a connection.

but I can not connect via sqlplus or the database homepage with firexfox. SqlDeveloper does not work either.

with sqlplus as root I get this error:

./bin/sqlplus / AS SYSDBA
SQL*Plus: Release 10.2.0.1.0 - Production on Sun Sep 10 23:03:32 2006
Copyright (c) 1982, 2005, Oracle. All rights reserved.
ERROR:
ORA-01031: insufficient privileges

as a non root user I get this:
ERROR:
ORA-12162: TNS:net service name is incorrectly specified


when I run lsnrctl status I get this:

LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 10-SEP-2006 23:05:17

Copyright (c) 1991, 2005, Oracle. All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC_FOR_XE)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 10.2.0.1.0 - Production
Start Date 10-SEP-2006 23:01:35
Uptime 0 days 0 hr. 3 min. 42 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Default Service XE
Listener Parameter File /usr/lib/oracle/xe/app/oracle/product/10.2.0/server/network/admin/listener.ora
Listener Log File /usr/lib/oracle/xe/app/oracle/product/10.2.0/server/network/log/listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC_FOR_XE)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=orca.wizards.de)(PORT=1521)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully



I am not oracle expert. I think the installation itselft was ok, but maybe the database
does not start correctly.

my configuration is like this:

cat /etc/sysconfig/oracle-xe

#This is a configuration file for automatic starting of the Oracle
#Database and listener at system startup.It is generated By running
#'/etc/init.d/oracle-xe configure'.Please use that method to modify this
#file

# ORACLE_DBENABLED:'true' means to load the Database at system boot.
ORACLE_DBENABLED=true

# LISTENER_PORT: Database listener
LISTENER_PORT=1521

# HTTP_PORT : HTTP port for Oracle Application Express
HTTP_PORT=8080

# Configuration : Check whether configure has been done or not
CONFIGURE_RUN=true


any idea what's wrong here ?

Markus