CFwindow open but without content

Hello everyone,

I have an issue with cfwindow, it usually work perfect, I'm trying to open the content of Help.cfm in a cfwindow. but when I test it it open the window but without content. just a blank window. ( I imported the cfwindow extension )

Here is my code :

calling page

<a href="#" onclick="openhelp()">Help</a></td>

the script

             function openhelp()
        {
  
    ColdFusion.Window.create('help', 'help', 'help.cfm?Window='+dt,  {x:100,y:100,height:700,width:880,modal:true ,initshow:true, closable:true, refreshOnShow:true
             })
        }