cannot establish a connection to SQL Server
<p>I have a web app that I developed using Visual Web Developer 2010. The database is local inside the solution: </p>

<pre><code>&lt;add name="SFDBConnectionString" 
     connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\SFDB.mdf;Integrated Security=True;User Instance=True"
     providerName="System.Data.SqlClient" /&gt;
</code></pre>

<p>I'm trying to run the app on another machine using Visual Studio 2010 instead of the web developer and it's giving me the following error when it tries to connect to the database:</p>

<blockquote>
  <p>A network-related or instance-specific error occurred while
  establishing a connection to SQL Server. The server was not found or
  was not accessible. Verify that the instance name is correct and that
  SQL Server is configured to allow remote connections. (provider: SQL
  Network Interfaces, error: 26 - Error Locating Server/Instance
  Specified)</p>
</blockquote>

<p>Does anybody has any idea on what could be happening?</p>
