No Wysiwyg API loaded if drupalimage is active - IE6 blank page [#361923]

I get a blank page in ie6 if I activate the drupalimage plugin.
The source code of the blank page:
<script type="text/javascript" src="/modules/img_assist/drupalimage/langs/en.js?L"></script>
I ddeactivated the plugin and tried to "add image" with the button under the body, but no popup window was generated and ie6 opens a blank page (http://www.jabulela.com/index.php?q=img_assist/load/textarea&textarea=body) with the source code

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN">
<html>
<head>
<title>Add image</title>
<script type="text/javascript" src="/misc/jquery.js?L"></script>
<script type="text/javascript" src="/misc/drupal.js?L"></script>
<script type="text/javascript" src="/modules/lightbox2/js/auto_image_handling.js?L"></script>
<script type="text/javascript" src="/modules/lightbox2/js/lightbox.js?L"></script>
<script type="text/javascript" src="/modules/img_assist/img_assist_popup.js?L"></script>
<script type="text/javascript" src="/modules/img_assist/img_assist_textarea.js?L"></script>
<script type="text/javascript">
<!--//--><![CDATA[//><!--
jQuery.extend(Drupal.settings, { "basePath": "/", "lightbox2": { "rtl": 0, "file_path": "/(\\w\\w/)files", "default_image": "/modules/lightbox2/images/brokenimage.jpg", "border_size": "10", "font_color": "000", "box_color": "fff", "top_position": "", "overlay_opacity": "0.8", "overlay_color": "000", "disable_close_click": 1, "resize_sequence": "0", "resize_speed": 400, "fade_in_speed": 400, "slide_down_speed": 600, "use_alt_layout": 0, "disable_resize": 0, "disable_zoom": 0, "force_show_nav": 0, "loop_items": 0, "node_link_text": "View Image Details", "node_link_target": 0, "image_count": "Image !current of !total", "video_count": "Video !current of !total", "page_count": "Page !current of !total", "lite_press_x_close": "press \x3ca href=\"#\" onclick=\"hideLightbox(); return FALSE;\"\x3e\x3ckbd\x3ex\x3c/kbd\x3e\x3c/a\x3e to close", "download_link_text": "", "enable_login": false, "enable_contact": false, "keys_close": "c x 27", "keys_previous": "p 37", "keys_next": "n 39", "keys_zoom": "z", "keys_play_pause": "32", "display_image_size": "", "image_node_sizes": "(\\.thumbnail|\\.preview)", "trigger_lightbox_classes": "img.image-img_assist_custom,img.thumbnail, img.image-thumbnail,img.preview, img.image-preview", "trigger_lightbox_group_classes": "", "trigger_slideshow_classes": "", "trigger_lightframe_classes": "", "trigger_lightframe_group_classes": "", "custom_class_handler": 0, "custom_trigger_classes": "", "disable_for_gallery_lists": 1, "disable_for_acidfree_gallery_lists": true, "enable_acidfree_videos": true, "slideshow_interval": 5000, "slideshow_automatic_start": true, "slideshow_automatic_exit": true, "show_play_pause": true, "pause_on_next_click": false, "pause_on_previous_click": true, "loop_slides": false, "iframe_width": 600, "iframe_height": 400, "iframe_border": 1, "enable_video": 0 } });
//--><!]]>
</script>
</head>

<frameset rows="38, *" onload="initLoader()" frameborder="0" border="0" framespacing="0">
<frame name="img_assist_header" src="" class="img_assist_header" noresize="noresize" />
<frame name="img_assist_main" src="" class="img_assist_main" noresize="noresize" />
</frameset>
</html>