Oracle SQL developer 11g shows the error

While am trying to connect sql developer in 11g it shows like this
LSNRCTL> status
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
TNS-12541: TNS:no listener
TNS-12560: TNS:protocol adapter error
TNS-00511: No listener
*32-bit Windows Error: 2: No such file or directory*
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=SKS)(PORT=1521)))
TNS-12545: Connect failed because target host or object does not exist
TNS-12560: TNS:protocol adapter error
TNS-00515: Connect failed because target host or object does not exist
*32-bit Windows Error: 1001: Unknown error*
LSNRCTL>
Pls help me what to do?..Am new...

Welcome to the forum.
You can easily look up the error messages in the Oracle Online Documentation @ http://www.oracle.com/pls/db112/homepage
Just enter the error code, and you'll get the cause and action, for example:
TNS-12545: Connect failed because target host or object does not exist
Cause: The address specified is not valid, or the program being connected to does not exist.
Action: Ensure the ADDRESS parameters have been entered correctly; the most likely incorrect parameter is the node name. Ensure that the executable for the server exists (perhaps "oracle" is missing.) If the protocol is TCP/IP, edit the TNSNAMES.ORA file to change the host name to a numeric IP address and try again.
It looks like you'll have to edit your tnsnames.ora, and also check if your listener is running.

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Hi,
i have installled Oracle 11g in Win2003 Server. When create new connection in Oracle SQL Developer its throwing following error
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933663 wrote:
Hi,
tnsnames.ora
%s_gtwSID% =
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STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for 32-bit Windows: Version 11.2.0.1.0 - Production
Start Date 13-JUL-2012 17:46:51
Uptime 0 days 0 hr. 29 min. 1 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Log File e:\app\XXXXXXX\diag\tnslsnr\YYYYYYYY\listener\alert\log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC1522ipc)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=mysystemname)(PORT=1522)))
Services Summary...
Service "CLRExtProc" has 1 instance(s).
Instance "CLRExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "orcl.mysystemname" has 1 instance(s).
Instance "orcl", status READY, has 1 handler(s) for this service...
Service "orclXDB.mysystemname" has 1 instance(s).
Instance "orcl", status READY, has 1 handler(s) for this service...
The command completed successfully
Thanks!you listener port on 1522 , but on your tnsnames.ora on 1521
Check your hostname on listener and tnsnames.ora
after do this changes please reload the listener
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Hello Irian and Sue,
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*)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = ORACLE)))*
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Oracle SQL developer 11g shows the error

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