HS - Generic - Transparent Confusion

I am attempting to connect to a SQL Server machine via Oracle 10gR1 on Windows.
I think I am getting the differences between heterogeneous services, generic connectivity and transparent gateways confused - and as a result am mixing up my configurations.
So far I have created a system DSN via the ODBC admin. called "oracletest". This DSN has been tested and is working just fine. Just in case it is important, it is using SQL Server Authentication.
Then I created the $ORACLE_HOME/hs/admin/iniths_oracletest.ora file with the following entries:
HS_FDS_CONNECT_INFO = oracletest
HS_FDS_TRACE_LEVEL = OFF
I then modified $ORACLE_HOME/network/admin/tnsnames.ora with
ORACLETEST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = ECYDBLCYADD01)(PORT = 1521))
(CONNECT_DATA = (SID=oracletest)
(HS = OK)
and $ORACLE_HOME/network/admin/listener.ora with
(SID_DESC =
(PROGRAM = hsodbc)
(ORACLE_HOME = e:\oracle\product\10.1.0\db_1)
(SID_NAME = oracletest)
I then bounced the listener and the database was registered. There was no registration of the oracletest entry. [Edit - the listener file was improperly named, once this was fixed the oracletest entry was registered at startup]
In sqlplus I created a database link
SQL> create databsase link oracletest using 'oracletest';
SQL> select * from combined_cd@oracletest;
ERROR at line 1:
ORA-28545: error diagnosed by Net8 when connecting to an agent
NCRO: Failed to make RSLV connection
ORA-02063: preceding 2 lines from ORACLETEST
I also changed $ORACLE_HOME/network/admin/sqlnet.ora
to SQLNET.AUTHENTICATION_SERVICES= (NONE)
from SQLNET.AUTHENTICATION_SERVICES= (NTS)
I haven't found any errors in the listener.log
I am guessing I am missing something small or have created some sort of vulcan mind meld of the different options that will never work.
Message was edited by: T
T

T,
For your information:
'Hetrogenous Services' is the name of the system that allows an Oracle database to make SQL-like connections to non-Oracle systems. There are two types - 'Generic Connectivity' and 'Transparent Gateway'. 'Generic Connectivity' allows you to connect to ODBC and OleDB sources, and is provided as part of the database license and install. The 'Transparent Gateways' are built for specific systems (such as Sybase), and are licensed seperately. I think 'Generic Connectivity' used to be called 'Transparent Gateway for ODBC'.
Your problem:
I think the file in '$ORACLE_HOME/hs/admin/' should be named 'initoracletest.ora', not 'iniths_oracletest.ora'.
Here is a guide to getting started with Generic Connectivity:
http://asktom.oracle.com/pls/ask/f?p=4950:8:::::F4950_P8_DISPLAYID:4406709207206#18830681837358
Mr T :-)

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