title: wcf message size causing permission issue
body: <p>silverlight 3.0 client </p>
  
  <p>wcf 3.0 VS.Net 2005 Web Site Win 2003 Server</p>
  
  <p>50 column observable collection.</p>
  
  <p>return observable collection  select top 975 * ... no problem</p>
  
  <p>return observable collection  select * .... Issue</p>
  
  <p>On SL client after proxy.Get 50 col OC</p>
  
  <p>logon screen from win 2003 server pops up </p>
  
  <p>Mever makes it to the completed event.</p>