title: SSRS New Dataset - Data source name not found and no default driver specified
body: <p>Hopefully someone can help with this before I rip all my hair out :)</p>
  
  <p>I've created a new data source, ODBC to a postgreSQL DB.  Connection sets up fine and test connection is successful.</p>
  
  <p>launch report builder to create a new dataset, select my new data source.</p>
  
  <p>popup asks for Data Source Credentials,  I enter the creds and then I get the following error:</p>
  
  <blockquote>
    <p>Unable to connect to data source 'DSNAME'</p>
    
    <p>ERROR [IM002] [Microsoft][ODBC Driver Manager] Data source name not
    found and no default driver specified</p>
  </blockquote>
  
  <p>sql 2012, report builder 3, 64bit PostgreSQL Unicode driver</p>
  
  <p>Thanks for any help.</p>