ORA-12541: TNS:no listener

Dear all,

I have no trouble connecting to orcl on a windows 2000 box if I don't specify a TNS connection string, whenever I do though, I get the error:

ORA-12541: TNS:no listener

The service is running and the database name is defined in tnsnames.ora.

What gives?

Cheers,

David

# tnsnames.ora Network Configuration File: G:\apps\oracle\product\10.1.0\Db_1\network\admin\tnsnames.ora # Generated by Oracle configuration tools.

ORCL =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = gyruss)(PORT = 1521))     (CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)

    )
  )

EXTPROC_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
    )
    (CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)

    )
  ) Received on Thu Oct 07 2004 - 23:59:44 CDT