I am not able to startup the listner, earlier it was running fine and i did't alter the listner file also.but when i shut down the db and started the listner i am getting this error.

TNS-01155: Incorrectly specified SID_LIST_LISTENER parameter in LISTENER.ORA
NL-00303: syntax error in NV string



this is my listner.ora file

# LISTENER.ORA Network Configuration File: /oracle/u01/network/admin/listener.ora
# Generated by Oracle configuration tools.

LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
)
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = blrgesun)(PORT = 1521))
)
)
)

SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /oracle/u01)
(PROGRAM = extproc)
)
(SID_DESC =
(GLOBAL_DBNAME = blrgeora)
(ORACLE_HOME = /oracle/u01)
(SID_NAME = blrgeora)
)
)


Thanks in advance