Excel (Office 2010 64 bit) will not connect to Oracle DB not matter what I try

Hello Everyone,
I started a new role that requires me to interact with an Oracle DB using Excel. Currently I have both the 32 bit and 64 bit Oracle clients installed on my Windows 7 PC.
Firstly I can TNSPing the database I need to connect to, I can also connect using SQLPlus to the desired database, I can even connect using TOAD.
No matter what I try I cannot connect using Excel VBA (Office 2010 64 bit).
The process below used to work for me in a different location, now the objDatabase always is returned "Empty"
Set objSession = CreateObject("OracleInProcServer.XOraSession")
Set objDataBase = objSession.OpenDatabase("database server", "user name/passsword", 0&)
I am not even able to set up a simple ODBC connection working. I get a error "ORA-12557: TNS:protocol adapter not loadable."
When using a ADODB connection I get this error. Run time error '-2147467259 (80004005)':
[Microsoft][ODBC Driver Manager] Data source name not found and default driver specified.
I have place the TNSNames file in both Oracle Home's
I have even reinstalled Office 2010.

Hi,
The 12577 error (12557: TNS:protocol adapter not loadable) is related to Windows Environment or Oracle Home PATH because sqlplus command works smoothly when I execute it inside ORACLE_HOME\bin.
There are two solutions to this issue:
1. Put the Oracle DB Home in front of the other paths in the PATH environment variable.
2. Remove ORACLE_HOME From environment Variable and re-boot PC
http://www.dba-oracle.com/t_ora_12577.htm
Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.
If you have further question about the ADODB, I recommend you post the question to MSDN forum:
http://social.msdn.microsoft.com/Forums/en-US/home?forum=exceldev&filter=alltypes&sort=lastpostdesc
Regards,
George Zhao
TechNet Community Support

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