ORA-12514 when trying to connect as sysdba

Hello All,
I am using ORACLE 10g R2
when trying to connect to SQLPUS in order to startup a database using the below commands :
set ORACLE_SID=dbname
C:\>sqlplus /nolog
SQL*Plus: Release 10.2.0.4.0 - Production on Tue Nov 3 10:50:13 2009
Copyright (c) 1982, 2007, Oracle. All Rights Reserved.
SQL> connect sys/password@dbname as sysdba
ERROR:
ORA-12514: TNS:listener does not currently know of service requested in connect
descriptor
I am facing the ORA -12514
Please advise how to solve it
Regards,

Hello,
My database is defined in the tnsnames and below is the status of the listener, you can see that the "The listener supports no services"
is it related to the problem, How can i force the listener to support my service?
LSNRCTL> status
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for 32-bit Windows: Version 10.2.0.4.0 - Produ
ction
Start Date 03-NOV-2009 10:49:34
Uptime 0 days 1 hr. 5 min. 21 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Log File C:\oracle\product\10.2.0\db_1\network\log\listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=-----)(P
ORT=1521)))
The listener supports no services
The command completed successfully

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ORA-12514 when trying to connect to the database using SERVICE

Hi,
Version 10204
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I run the following commands:
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XYZ =
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(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = XYZ)
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> exec DBMS_SERVICE.CREATE_SERVICE('xyz','xyz');
PL/SQL procedure successfully completed.
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PL/SQL procedure successfully completed.
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Copyright (c) 1982, 2007, Oracle. All Rights Reserved.
ERROR:
ORA-12514: TNS:listener does not currently know of service requested in connect
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When i am trying to connect , not via the service , its successed:
sqlplus ac/ac@dwh
SQL*Plus: Release 10.2.0.4.0 - Production on Sat Nov 1 14:45:07 2008
Copyright (c) 1982, 2007, Oracle. All Rights Reserved.
Connected to:
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With the Partitioning, OLAP, Data Mining and Real Application Testing options
Could you please help to understand why its failed to connect via SERVICE ?
Thanks

You told us.
ORA-12514: TNS:listener does not currently know of service requested in connect descriptor.
I ask some questions, you set alias for listener port (no default) + local_listener parameter, don't you?
If you did....
Please check by .....
lsnrctl status
lsnrctl service
Let me show my example:
About 1522 (no default port)
SQL> show parameter local_listener
NAME TYPE VALUE
local_listener string ALIASLISTENER
- check tnsnames.ora file in the same location listener.ora file.
$ cat tnsnames.ora
ALIASLISTENER=
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost )(PORT = 1522))
- About create new service
SQL> show parameter service_names
NAME TYPE VALUE
service_names string db
SQL> exec DBMS_SERVICE.CREATE_SERVICE('xyz','xyz');
PL/SQL procedure successfully completed.
SQL> exec DBMS_SERVICE.START_SERVICE('xyz');
PL/SQL procedure successfully completed.
SQL> show parameter service_names
NAME TYPE VALUE
service_names string xyz
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LSNRCTL for Linux: Version 11.1.0.6.0 - Production on 02-NOV-2008 03:29:21
Copyright (c) 1991, 2007, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=hostname)(PORT=1522)))
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Alias LISTENER
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SNMP OFF
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Listener Log File ORACLE_HOME/log/diag/tnslsnr/hostname/listener/alert/log.xml
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(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=hostname)(PORT=1522)))
Services Summary...
Service "db" has 1 instance(s).
Instance "db", status READY, has 1 handler(s) for this service...
Service "db2XDB" has 1 instance(s).
Instance "db", status READY, has 1 handler(s) for this service...
Service "db_XPT" has 1 instance(s).
Instance "db", status READY, has 1 handler(s) for this service...
Service "xyz" has 1 instance(s).
Instance "db", status READY, has 1 handler(s) for this service...
$ lsnrctl service
LSNRCTL for Linux: Version 11.1.0.6.0 - Production on 02-NOV-2008 03:29:40
Copyright (c) 1991, 2007, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=hostname)(PORT=1522)))
Services Summary...
Service "db" has 1 instance(s).
Instance "db", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
Service "db2XDB" has 1 instance(s).
Instance "db", status READY, has 1 handler(s) for this service...
Handler(s):
"D000" established:0 refused:0 current:0 max:972 state:ready
DISPATCHER <machine: hostname, pid: 30200>
(ADDRESS=(PROTOCOL=tcp)(HOST=hostname)(PORT=45572))
Service "db_XPT" has 1 instance(s).
Instance "db", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
Service "xyz" has 1 instance(s).
Instance "db", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
The command completed successfully

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RDBMS Version:: 9.2.0.6
Operating System and Version:: Win2003 Small Business Server
Error Number (if applicable):: ORA-03113
Server Net Version:: 9.2.0.6
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