Cfwindow javascript error

When I use following coding in my project, I got javascript error. This error shows as follow :

error: http: Error retrieving markup for element editWindow_body : Not Found......

<cfajaximport tags="cfwindow">

<script>

  function makeWin(x,y) {

      ColdFusion.Window.create('mywin','Windows Rules','win.cfm',{x:x+25,y:y+25});

  }

</script>

  <h2>Test</h2> 

  <p>

  This is the test <a href="" onclick="makeWin(event.pageX,event.pageY);return false;">link</a>.

  </p>

All responses will be appreciated.