About error TNS-03505

Question

Hi to all,
I have created a DB Link to remote MS SQL Server DB and I have modified the listener .ora and tnsnames.ora files.
The link work fine fine; if I try to query a remote table, the data are correctly displayed.
But if I run the tnsping <myconnection> an error TNS-03505 is returned.
Can You help me ?
This is the listener.ora
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(ADDRESS = (PROTOCOL = TCP)(HOST = <myHost>)(PORT = 1521))
(ADDRESS =( PROTOCOL = ipc)(KEY = PNPKEY))
(ADDRESS = (PROTOCOL = TCP)(HOST = <myHost>)(PORT = 1522))
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = D:\oracle\product\10.2.0\OraDb10g)
(PROGRAM = extproc)
(SID_DESC=
(SID_NAME=MYSQLDSN)
(ORACLE_HOME = d:\oracle\product\10.2.0\Oradb10g)
(PROGRAM=hsodbc)
and this my tnsnames.ora
MYAPPDB =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = <myHost>)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = MYAPPDB)
MYSQLDSN =
(DESCRIPTION=
(ADDRESS=(PROTOCOL=tcp)(HOST=<myHost>)(PORT=1522))
(CONNECT_DATA=(SID=MYSQLDSN))
(HS=OK)
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
Thanks in advance and Best Regards
Gaetano

Answer 1

03505, 00000, "Failed to resolve name"
// *Cause:  The service name you provided could not be found in TNSNAMES.ORA,
// an Oracle Names server, or a native naming service.
// *Action: Verify that you entered the service name correctly.  You may need
// to ensure that the name was entered correctly into the network
// configuration.