title: Can't open site in SharePoint Designer
body: <p>I'm trying to open a sharepoint site in SPD with no success. 
  SPD is processing, and nothing happens, it keeps processing as if it wouldn't find the site. </p>
  
  <p>Do you have any clue where it comes from ? </p>
  
  <p>For information I'm using the Site administration for this and the SPDSettings of the Web Application are all set to true.</p>
  
  <p>EDIT : After waiting for 10 minutes I had this error : 
  Service Unavailable
     Service Unavailable HTTP Error 503. The service is unavailable.</p>
  
  <p>EDIT 2 : I think this error comes from the fact that i was deploying another solution in the same web application, but in another site collection ...</p>