ERROR: ORA-12514: TNS:listener does not currently know of service requested in connect descriptor

Oracle database 11g r2 32bit

Window server 2003 r2

C:\Documents and Settings\Administrator>lsnrctl status

LSNRCTL for 32-bit Windows: Version 11.2.0.1.0 - Production on 24-MAY-2015 14:54

:17

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Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))

STATUS of the LISTENER

------------------------

Alias                     LISTENER

Version                   TNSLSNR for 32-bit Windows: Version 11.2.0.1.0 - Produ

ction

Start Date                24-MAY-2015 14:45:28

Uptime                    0 days 0 hr. 8 min. 50 sec

Trace Level               off

Security                  ON: Local OS Authentication

SNMP                      OFF

Listener Parameter File   E:\app\Administrator\product\11.2.0\dbhome_1\network\a

dmin\listener.ora

Listener Log File         e:\app\administrator\diag\tnslsnr\oracledg1\listener\a

lert\log.xml

Listening Endpoints Summary...