title: 500.21 internal serve error bad module has a bad module "ManagedPipelineHandler" in its module list
body: <p>we have a website which runs under v4.0 , Classic Mode. We have recently created new httphandler and when we request to this handler we receive 
  500.21 internal serve error - bad module has a bad module "ManagedPipelineHandler" in its module list.</p>
  
  <p>WebSite works fine with no issues.  I have tried all possible solution given in google like regiis &amp; add entry of handler to system.webserver but nothing has worked for me. </p>
  
  <p>Can someone give some idea on the same?</p>