重新启动服务器后出现 ORA-12514 错误

Till yesterday I was able to use Oracle SQL Developer in the same client.
Today morning we restarted the server for maintanance. After restarting the server, I cannot able to login from client .Net application or sqldeveloper.
I can able to log-in thru sql plus of server system.
Apart from that i cannot able to log in by any other means.
Server side sql-developer also not working.
I have give below details from the server:

lsnrctl 服务:

    C:UsersAdministrator>lsnrctl services

LSNRCTL for 64-bit Windows: Version 11.2.0.1.0 - Production on 07-JAN-2014 15:
:45

Copyright (c) 1991, 2010, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=172.17.26.7)(PORT=1521
)
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
The command completed successfully

lsnrctl 状态:

C:UsersAdministrator>lsnrctl status

LSNRCTL for 64-bit Windows: Version 11.2.0.1.0 - Production on 07-JAN-2014 15:20
:42

Copyright (c) 1991, 2010, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=172.17.26.7)(PORT=1521))
)
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for 64-bit Windows: Version 11.2.0.1.0 - Produ
ction
Start Date                07-JAN-2014 13:17:40
Uptime                    0 days 2 hr. 3 min. 7 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   E:appadministratorproduct11.2.0dbhome_1
etworka
dminlistener.ora
Listener Log File         e:appadministratordiag	nslsnrcplas3listeneraler
tlog.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=172.17.26.7)(PORT=1521)))
Services Summary...
Service "CLRExtProc" has 1 instance(s).
  Instance "CLRExtProc", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully  

LISTENER.ORA

# listener.ora Network Configuration File: E:appadministratorproduct11.2.0dbhome_1
etworkadminlistener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = CLRExtProc)
      (ORACLE_HOME = E:appadministratorproduct11.2.0)
      (PROGRAM = extproc)
      (ENVS = "EXTPROC_DLLS=ONLY:E:appadministratorproduct11.2.0dbhome_1inoraclr11.dll")
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 172.17.26.7)(PORT = 1521))
    )
  )

ADR_BASE_LISTENER = E:appadministrator  

SQLNET.ORA

# sqlnet.ora Network Configuration File: E:appadministratorproduct11.2.0dbhome_1
etworkadminsqlnet.ora
# Generated by Oracle configuration tools.

# This file is actually generated by netca. But if customers choose to 
# install "Software Only", this file wont exist and without the native 
# authentication, they will not be able to connect to the database on NT.

SQLNET.AUTHENTICATION_SERVICES= (NTS)

NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)


TNSFILES.ORA

    # tnsnames.ora Network Configuration File: E:appadministratorproduct11.2.0dbhome_1
etworkadmin	nsnames.ora
    # Generated by Oracle configuration tools.

    ORACLR_CONNECTION_DATA =
      (DESCRIPTION =
        (ADDRESS_LIST =
          (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
        )
        (CONNECT_DATA =
          (SID = CLRExtProc)
          (PRESENTATION = RO)
        )
      )

    ORCL =
      (DESCRIPTION =
        (ADDRESS = (PROTOCOL = TCP)(HOST = 172.17.26.7)(PORT = 1521))
        (CONNECT_DATA =
          (SERVER = DEDICATED)
          (SERVICE_NAME = orcl.cplas3.com)
        )
      ) 

tnsping 结果 - orcl.cplas3.com

C:UsersAdministrator>tnsping orcl.cplas3.com

TNS Ping Utility for 64-bit Windows: Version 11.2.0.1.0 - Production on 07-JAN-2
014 15:30:44

Copyright (c) 1997, 2010, Oracle.  All rights reserved.

Used parameter files:
E:appadministratorproduct11.2.0dbhome_1
etworkadminsqlnet.ora

TNS-03505: Failed to resolve name

tnsping 结果 - orcl

C:UsersAdministrator>tnsping orcl

TNS Ping Utility for 64-bit Windows: Version 11.2.0.1.0 - Production on 07-JAN-2
014 15:31:22

Copyright (c) 1997, 2010, Oracle.  All rights reserved.

Used parameter files:
E:appadministratorproduct11.2.0dbhome_1
etworkadminsqlnet.ora


Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 172.17.2
6.7)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = orcl.cpl
as3.com)))
OK (1560 msec)

错误:
来自 .Net 应用程序:
ORA-12514 TNS:Listener 当前不知道连接描述符中的服务请求.

alter system set local_listener = '(ADDRESS=(PROTOCOL=TCP)(HOST=172.17.26.7)(PORT=1521))' scope=memory;
alter system register;

alter system set local_listener = '172.17.26.7:1521' scope=memory;
alter system register;