Ora-12505 with a standby database?

Hi there everybody,

I am running a primary and a standby database both on 8.1.7.4, win2k server and on separate servers.

I have configured the standby database so it in managed recover and is waiting for an archive log.

I seem to be getting an ORA-12505 error message when the primary database is trying to send the log to the standby database.

ORA-12505: TNS:listener could not resolve SID given in connect descriptor

The primary databases TNSlistener.ora:

# TNSNAMES.ORA Network Configuration File: D:\Oracle\ora817\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.

EXTPROC_CONNECTION_DATA.*********** =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC3))
    )
    (CONNECT_DATA =
      (SID = PLSExtProc)
      (PRESENTATION = RO)
    )
  )

INST1_HTTP.************* =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = DELL_SERVER)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVER = SHARED)
      (SERVICE_NAME = MODOSE)
      (PRESENTATION = http://admin)
    )
  )

TR2.*************** =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = DELL_SERVER)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = tr2)
    )
  )

STANDBY1 = (DESCRIPTION= (ADDRESS=(PROTOCOL=TCP)
      (PORT=5112) (HOST=TEST-SERVER))
      (CONNECT_DATA=(SID=standby1)))

The standby databases listener.ora

# LISTENER.ORA Network Configuration File: C:\oracle\ora81\network\admin\listener.ora
# Generated by Oracle configuration tools.

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS_LIST =
        (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
      )
      (ADDRESS_LIST =
        (ADDRESS = (PROTOCOL = TCP)(HOST = test-server)(PORT = 1521))
      )
    )
      (ADDRESS_LIST=
         (ADDRESS=(PROTOCOL=TCP)(PORT=5112)(HOST=test-server)))

    (DESCRIPTION =
      (PROTOCOL_STACK =
        (PRESENTATION = GIOP)
        (SESSION = RAW)
      )
      (ADDRESS = (PROTOCOL = TCP)(HOST = test-server)(PORT = 2481))
    )
  )

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = C:\oracle\ora81)
      (PROGRAM = extproc)
    )
   (SID_DESC=
    (SID_NAME=standby1)
     (ORACLE_HOME=\ORACLE\ORA81))

    (SID_DESC =
      (GLOBAL_DBNAME = standby1.global)
      (ORACLE_HOME = C:\oracle\ora81)
      (SID_NAME = standby1)
    )
  )

STANDBY_LISTENER = (ADDRESS_LIST=
 (ADDRESS=(PROTOCOL=tcp)(PORT=5112)(HOST=test-server)))

SID_LIST_STBY1_LISTENER = (SID_LIST=
      (SID_DESC=(SID_NAME=standby1)(ORACLE_HOME=\ORACLE\ORA81)))

The only other error that I could find on either of the server is a: TNS-12564: TNS:connection refused in the sqlnet.ora on the primary database.

I really need a fresh pair of eyes to look that this as I am sure that I am missing something very simple.

Thanks in advance

Eddy