title: Datasets/data sources no longer work when deploying reports to a new server
body: <p>I have a set of reports on a SSRS 2012 server and they work fine.  We are moving to a new server, so I changed the server in the report property and redeployed.  The reports are on the new server, but none of the shared datasets and data sources work anymore.  I get this error:</p>
  
  <pre><code>Cannot create a connection to data source ' Data source for shared dataset'. (rsErrorOpeningConnection)"
  </code></pre>
  
  <p>All the datasets and data sources use predefined credentials.  I look at the reports in Visual Studio and I can connect just fine.  Can anyone tell me why deploying to a new server breaks everything?</p>