title: Chart control in visual web developer express 2010 is unavailable
body: <p>I've just rebuilt my PC and have upgraded to visual web developer express 2010. I have imported my projects which use the charting control quite a bit. Unfortunately my projects are failing to run. In design view the control is now showing as "unknown server tag asp:chart". I can see the Chart control in the data tab in the toolbox but it is greyed out. </p>
  
  <p>Does anyone have an idea for how I can fix this?</p>
  
  <p>Thanks,</p>
  
  <p>Jonesy</p>