ERROR [IM002] [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified

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C#

Web.Config :

<add name="locator" connectionString="Driver={MySQL ODBC 5.3 ANSI Driver};SERVER=localhost;DNS=myDNS;Database=myDatabase;UID=root;OPTION=3" providerName="System.Data.Odbc" />

Behind code :

using System.Data.Odbc;

string ConnectionString = ConfigurationManager.ConnectionStrings["locator"].ToString();
            
DbConnection = new OdbcConnection(ConnectionString);
                   DbConnection.Open()

I have been go through check with the list below:-

Win+RUN => odbcad32.exe
Data Sources (ODBC) - Installed Windows (x86, 64-bit), MSI Installer
REF: http://dev.mysql.com/downloads/connector/odbc/

Connection Parameters:

Data Souces Name: myDNS
Description     : [leave it empty]
TCP/IP address  : 127.0.0.1
Name Pipe       : [AutoDisabled]
User            : root
password        : [blank]
Database        : myDatabase
Click button test -> Connection Successful
Click OK

I do the same with [User DNS] and [System DNS].

Click Tab -> Connection Pool
Enable perfMon
Click Apply

Connection string value - >

Driver={MySQL ODBC 5.3 ANSI Driver};SERVER=localhost;DNS=myDNS;Database=myDatabase;UID=root;OPTION=3

The value is there, but when it come to open the database, it hit the error of the subject title. LOCALHOST was running well, as i using HeidiSQL 8.3.0.4694 it allow me to connected the local database using UID: root and pwd: [blank].

Information Hosting & debugging

hosting      : wampServer 2.1 x32[Online]
Database     : mySQL [Heidi 8.3]
Visual studio: debugging mode hit the error.
OS           : windows 7 

Anything i can furthermore to check with? Please help out =(