hi every one,

i am using oracle 11g

i am facing a problem working with a scenario in RMAN,
actuallly i have one target DB and catalog DB. i have have created an auxiliary instance one the target DB. when i tried to connect to both the target and auxiliary database from catalog DB using RMAN, i am getting an error

RMAN-04006: error from auxiliary database: ORA-28547: connection to server failed,probable Oracle Net admin error

i have configured both listener.ora for both target and auxiliary database in listener.ora and correspondingly in tnsnames.ora


following ar my listener.ora and tnsnames.ora files;

LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC3))
)
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = Practice)(PORT = 1521))
)
)
)

SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = yempati)
(ORACLE_HOME = /oraeng/app/oracle/product/11.1.0)
(PROGRAM = extproc)
)
(SID_DESC =
(GLOBAL_DBNAME = yempati)
(ORACLE_HOME = /oraeng/app/oracle/product/11.1.0)
(SID_NAME = yempati)
)
)



LISTENER2 =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
)
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = Practice)(PORT = 1321))
)
)
)

SID_LIST_LISTENER2 =
(SID_LIST =
(SID_DESC =
(SID_NAME = aux)
(ORACLE_HOME = /oraeng/app/oracle/product/11.1.0)
(PROGRAM = extproc)
)
(SID_DESC =
(GLOBAL_DBNAME = yempati)
(ORACLE_HOME = /oraeng/app/oracle/product/11.1.0)
(SID_NAME = aux)
)
)



tnsnames.ora:]


yempati =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.2.2.30)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = yempati)
)
)

auxll =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.2.2.30)(PORT = 1321))
)
(CONNECT_DATA =
(SERVICE_NAME = aux)
)
)


can u please check where the peoblem is?