Windows / .NET :: ODBC Setup Error For Oracle Client

I'm trying to setup ODBC connection for my Oracle client while installing BO. Following are the steps I followed.

1. Downloaded the Oracle Client from the link [URL] . From that downloaded two zip files. “Instant Client Package – Basic Lite" and “Instant Client Package – ODBC”. Extracted the Zip Files to the folder I created under C: as C:Oracleinstantclient_11_2.

2. Since I'm setting up in ODBC in windows 2008 64-bit R2. I was advised to install 32 bit . So in cmd prompt, from the location C:Oracleinstantclient_11_2, ran odbc_install.

3.Created the Environment variables as
i) *TNS_ADMIN - C:Oracleinstantclient_11_2*
ii) *Oracle_Home - C:Oracleinstantclient_11_2*
iii) *Edited the PATH variable with ;C:Oracleinstantclient_11_2*

4. Created the tnsnames.ora file in C:Oracleinstantclient_11_2. Its content are as follows.
clarity_dev =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = claritydev.vip.its.ebay.com )(PORT = 1521))
)
(CONNECT_DATA =
(SID = clarity)
)
)

5. From the folder %windir%sysWOW64odbacd32.exe, Opens ODBC Data Source Adminsitartor. In that I found my Oracle in instantclient_11_2 and added following details.

Data Source Name : claritydev.vip.its.com
TNS Service Name : clarity_dev
User Id: clarity1

When I test connect it, I get error *ORA-12154:*
*     TNS:could not resolve the connect identifier specified*

I've seen FAQs for this error, but couldn't find anything which solves. Is there any steps I'm missing? I've checked in DB properties. It uses SID not the Service Name.