title: The underlying provider failed on Open Entity Framework when WCF Service to TCP/IP
body: <p>I have an MVC application that access a WCF Service connected to Entity Framework.</p>
  
  <p>I switched the connection from MVC application to WCF Service to TCP/IP from basichttp and now I get an error - the underlying provider failed on open. while accessing Entity Framework. this error doesnt happen on basichttp.</p>
  
  <p>WCF service runs on IIS7.5 app pool is set to integrated mode.</p>
  
  <p>connections string:</p>
  
  <pre><code>&lt;add name="lc"  
       connectionString="metadata=res://*/Lib.csdl|res://*/Lib.ssdl|res://*/Lib.msl;provider=System.Data.SqlClient;provider connection string=&amp;quot;data source=(local);initial catalog=OB;integrated security=True;multipleactiveresultsets=True;App=EntityFramework&amp;quot;" 
       providerName="System.Data.EntityClient" /&gt;
  </code></pre>
  
  <p>Not sure if this is related but I do not want to use sql server authentication only windows authentication.</p>
  
  <p>Thank you for your help.</p>