HS_FDS_CONNECT_INFO = gosales
HS_FDS_TRACE_LEVEL = off
HS_AUTOREGISTER = TRUE
HS_DB_NAME = hsodbc
============================================
My listener.ora.

(SID_DESC =
(SID_NAME = hsgosales)
(ORACLE_HOME = c:\Oracle\Ora92)
(PROGRAM = hsodbc)
)
=========================================
my tnsnames.ora

gosales.mtc =

(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
)
(CONNECT_DATA =
(SID = hsgosales)
)
(HS=OK)
)
================================================
TNSPING Results for TNSPING GOSALES.MTC

Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = IPC)
(KEY = EXTPROC0))) (CONNECT_DATA = (SID = hsgosales)) (HS=OK))
OK (20 msec)
=================================================
My database link syntax:

drop database link gosales;
create database link gosales using ‘gosales.mtc’;
==================================================
When I run my select:

select * from countries@gosales;

ERROR at line 1:
ORA-28500: connection from ORACLE to a non-Oracle system returned this message:
[Generic Connectivity Using ODBC]
ORA-02063: preceding 2 lines from GOSALES