Having trouble creating new connection in SQLDeveloper

Question

When I try to create a new connection in SQLDeveloper, I get the following message:
Status : Failure -Test failed: Listener refused the connection with the following error:
ORA-12505, TNS:listener does not currently know of SID given in connect descriptor
The username and password are the same as the ones I use to connect to sqlplus, right? I am a complete newb to sql, so I would really appreciate if someone could provide a step-by-step solution.

Answer 1

C:\Users\Admin>lsnrctl
LSNRCTL for 64-bit Windows: Version 11.2.0.1.0 - Production on 26-APR-2013 21:00
:01
Copyright (c) 1991, 2010, Oracle. All rights reserved.
Welcome to LSNRCTL, type "help" for information.
LSNRCTL> status
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1522)))
STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for 64-bit Windows: Version 11.2.0.1.0 - Produ
ction
Start Date 26-APR-2013 17:55:47
Uptime 0 days 3 hr. 4 min. 19 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File C:\app\Admin\product\11.2.0\dbhome_2\network\admin\lis
tener.ora
Listener Log File c:\app\admin\diag\tnslsnr\Admin-PC\listener\alert\log.
xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC1522ipc)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=Admin-PC)(PORT=1522)))
Services Summary...
Service "CLRExtProc" has 1 instance(s).
Instance "CLRExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "orcl.gateway.2wire.net" has 1 instance(s).
Instance "orcl", status READY, has 1 handler(s) for this service...
Service "orclXDB.gateway.2wire.net" has 1 instance(s).
Instance "orcl", status READY, has 1 handler(s) for this service...
The command completed successfully
LSNRCTL> service
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1522)))
Services Summary...
Service "CLRExtProc" has 1 instance(s).
Instance "CLRExtProc", status UNKNOWN, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0
LOCAL SERVER
Service "orcl.gateway.2wire.net" has 1 instance(s).
Instance "orcl", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
Service "orclXDB.gateway.2wire.net" has 1 instance(s).
Instance "orcl", status READY, has 1 handler(s) for this service...
Handler(s):
"D000" established:0 refused:0 current:0 max:1022 state:ready
DISPATCHER <machine: ADMIN-PC, pid: 4496>
(ADDRESS=(PROTOCOL=tcp)(HOST=Admin-PC)(PORT=49224))
The command completed successfully
LSNRCTL>