Erro ORA-12514 10G para 8.0.5

[airoospParticipante]

O problema esta na hora de fazer a conexão com o servidor S1, segue abaixo o conteúdo do arquivo tnsnames.ora

tnsnames.ora Network Configuration File: D:oracleproduct10.2.0db_1networkadmintnsnames.ora

Generated by Oracle configuration tools.

M1 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 172.17.5.15)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = ORCL)
)
)

BANCO_TESTE =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 172.17.5.212)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = ORCL)
)
)

P1 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 172.17.5.6)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = ORCL)
)
)

ORCL =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = bd10g.cen)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
)
)

EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
)
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
)
)

S1 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 172.17.5.16)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = orcl)
)
)

Obrigado.

Airton