А мне кажется, что вы пытаетесь для каждой базы делать свой листенер, вместо того чтобы использовать общий для нескольких баз.

# LISTENER.ORA Network Configuration File: /extend/Ora9i/network/admin/listener.ora
# Generated by Oracle configuration tools.

SID_LIST_GUINEVERE =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = test)
(ORACLE_HOME = /extend/Ora9i)
(SID_NAME = test)
)
(SID_DESC =
(GLOBAL_DBNAME = GRETA40)
(ORACLE_HOME = /extend/Ora9i)
(SID_NAME = GRETA40)
)
(SID_DESC =
(GLOBAL_DBNAME = trm)
(ORACLE_HOME = /extend/Ora9i)
(SID_NAME = trm)
)
)

GUINEVERE =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = Guinevere.rnhb.lv)(PORT = 1521))
)
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = orcl))
)
)
)