TinyMCE and TinyBrowser, blank screen on add image

Have anyone got any idea about this. I have successfully installed TinyMCE with LG’s extension and followed the following tutorial to integrate TinyBrowser:

http://www.wil-linssen.com/tinymce-wysiwyg-editor-with-tinybrowser-file-browser-in-expression-engine/

Now when I click on ‘add image’ a small browser window opens, but is blank. The URL of the page that opens in the window shows it is image.htm in the advimage plugin folder, and when I view source there is code there, but the body is set to display:none.

I even opened this file and took away the display:none from the body, but when you view it again it is still there in the body tag - display:none

Anyone had this problem before or have any ideas on how to correct it?

many thanks