Strange ODBC problem with 64 bit (x64) 10.2 client

Hi,
I'm encountering a strange problem with the 64 bit ODBC driver that comes with the 64 bit (x64) 10.2 client. I have installed the client and that all went fine, and I can use sqlplus to access my databases.
Now, I have setup an ODBC datasource using the Oracle ODBC driver that gets installed and if I click on the Test button and provide correct login information I get connected just fine.
So, now if I attempt to use this ODBC datasource from a 64 bit program that I am writing, I get the following error message :
[Oracle][ODBC][Ora]ORA-12154: TNS:could not resolve the connect identifier specified.
I'm know my program is ok because I have tested it with other ODBC drivers and they work. I can't seem to determine what exactly I'm missing that is making this not work. I have set the environment variables TNS_ADMIN and ORACLE_HOME to point to the correct places - I think, but that doesn't help. Also, the Oracle \bin directory is in the path as I thnk it should be.
I'm stumped. Does anybody have any idea what could be the problem here ?
Thanks,
Nick

Hi,
I tried that and I couldn't get it to connect using the Oracle ODBC driver. It worked fine if I picked a SQL server ODBC datasource, but not an Oracle one. With the Oracle ODBC DSN, I don't even get an Oracle message, I get an ODBC configuration error.
I'm pretty sure that the Oracle ODBC driver is 64-bit since the ODBC admin program is a 64-bit program and it is able to do the test ok.
I'm think that the when using the ODBC driver, there is something in the environment or in the naming of the DSN that I am doing wrong

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