How to rectify this issues: asp.net PageRequestManagerParserErrorException
<p>i have a search panel where on click of search button im getting this exception this is for the first time, subsequent click it result the proper result.</p>

<p>Can any one explain how solve the issue.</p>

<p>error message:</p>

<blockquote>
  <p>Sys.WebForms.PageRequestManagerParserErrorException:
  The Message received from the server
  could not be  parsed.Coommon causes
  for this error are when the response
  is modified by Calls to
  Repose.Write(), response
  filters,HttpModules, or server trace
  is enabled. Details:Error Parsing near
  ' |  '.</p>
</blockquote>
