CKEditor doesn't work anylonger with CKFinder

I just installed CKFinder on my webspace. If I use CKFinder as standalone (web/ckfinder/ckfinder.html) it works properly.
Then I wanted to integrate it in CKEditor which was already installed and used on my website.

I did it this way:

<textarea name="txt_content"></textarea>
<script type="text/javascript">
   CKEDITOR.replace( 'txt_content',
    {
      customConfig : '../scripts/ckeditor_style.js'

      filebrowserBrowseUrl : '../ckfinder/ckfinder.html',
      filebrowserImageBrowseUrl : '../ckfinder/ckfinder.html?type=Images',
      filebrowserFlashBrowseUrl : '../ckfinder/ckfinder.html?type=Flash',
      filebrowserUploadUrl : '../ckfinder/core/connector/php/connector.php?command=QuickUpload&type=Files',
      filebrowserImageUploadUrl : '../ckfinder/core/connector/php/connector.php?command=QuickUpload&type=Images',
      filebrowserFlashUploadUrl : '../ckfinder/core/connector/php/connector.php?command=QuickUpload&type=Flash'

    });
</script>

However, now CKEditor does not even appear on the website.
What did I do wrong?