急！！！！关于fckEditor编辑框的问题

<script type="text/javascript">
function aa(fck){
alert(fck);//这里能是显示值的
 var oEditor = FCKeditorAPI.GetInstance("testfck") ;
     oEditor.SetHTML(fck) ;//这里不能输入
}
</script>
  </head>
  
  <body onload='aa("${fck }");'>
  <form action="fckEditor" method="post" >   
    
      <fck:editor id="testfck"   
                  basePath="/kuangj/fckeditor/"   
                  height="60%"   
                  skinPath="/kuangj/fckeditor/editor/skins/default/"   
                  toolbarSet="Default"   
                  imageBrowserURL="/kuangj/fckeditor/editor/filemanager/browser/default/browser.html?Type=Image&Connector=connectors/jsp/connector"   
                  linkBrowserURL="/kuangj/fckeditor/editor/filemanager/browser/default/browser.html?Connector=connectors/jsp/connector"   
                  flashBrowserURL="/kuangj/fckeditor/editor/filemanager/browser/default/browser.html?Type=Flash&Connector=connectors/jsp/connector"   
                  imageUploadURL="/kuangj/fckeditor/editor/filemanager/upload/simpleuploader?Type=Image"   
                  linkUploadURL="/kuangj/fckeditor/editor/filemanager/upload/simpleuploader?Type=File"   
                  flashUploadURL="/kuangj/fckeditor/editor/filemanager/upload/simpleuploader?Type=Flash">   
    
      </fck:editor>   
      <hr>   
      <input type="submit" value="提交">   
    </form>   这个是我写在JSP中的代码，fck是一个字符串，我想在fckEditor中编辑它，但在IE6中fckEditor编辑框中始终不能显示fck内容，在火狐中可以显示的，请各位大侠指点下这个是为什么，如何解决。