Unable to connect SQLState=08004 Oracle ODBC Ora-12154

Hi Sir/Madam,
I am Wayne, I need your help to resolve my issue in oracle database 11g.
1. I installed Oracle 11g Personal Edition, Release 11.2.0.10, 64bits,
2. Test connection(oracle in oradb11g_home1) is successed in data source, odbc,
2. Then, I tried to connect this with Visual Basic(Visual Studio 2010), data connections, add connections, .net framework data provider for oracle,
3. but I received an error message as "Attempt to load Oracle client libraries threw BadImageFormatException."
4. Then, I download the ODAC(11.2.0.3.0) for 64bits, and installed,
5. I tried to test the connection, but failed with error message as stated above,
"Unable to connect SQLState=08004 Oracle ODBC Ora-12154: TNS:could not resolve the connect identifier specified"
Could you please give me a help on this, do I need to install ODAC for 11g Personal Edition ? Please advice accordingly, thanks.

Hi;
Please review:
https://kr.forums.oracle.com/forums/thread.jspa?threadID=2309520
http://stackoverflow.com/questions/206055/oracle-ora-12154-tns-could-not-resolve-service-name-error
Regard
Helios

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08004:[oracle][odbc][ora]ora-12154: TNS: could not resolve the connect ....

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Re: 08004:[oracle][odbc][ora]ora-12154: TNS: could not resolve the connect ....
Posted: Aug 22, 2011 5:56 PM     in response to: John Fleming
     Edit                          Reply
I am receiving a similar error.
Failed to open the connection.
Details: 08004:[Oracle][ODBC][Ora]ORA-12154: TNS:could not resolve the connect identifier specified [Database Vendor Code: 12154]
I've seen all sorts of discussion on the intertubes about possible fixes however, none stated are practical or they do not address my error specifically. I've exhausted resources on the net as well as those available to me.
I'm currently running SAP Crystal Reports 2011 on WIN7 64bit and using Oracle in OraClient 10g_home1.
Please let me know what insight you have. I cannot roll back to previous versions of Windows nor less encryption.
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