ck finder not working with ckeditor

Could you paste the code that you have used to launch CKFinder, CKEditor and integrate them together?
If you have decided to launch CKEditor using ckeditor class for textarea, then setting the following in config.js should work:

CKEDITOR.editorConfig = function( config )
{
    config.filebrowserBrowseUrl = '/ckfinder/ckfinder.html';
    config.filebrowserImageBrowseUrl = '/ckfinder/ckfinder.html?type=Images';
    config.filebrowserFlashBrowseUrl = '/ckfinder/ckfinder.html?type=Flash';
    config.filebrowserUploadUrl = '/ckfinder/core/connector/php/connector.php?command=QuickUpload&type=Files';
    config.filebrowserImageUploadUrl = '/ckfinder/core/connector/php/connector.php?command=QuickUpload&type=Images';
    config.filebrowserFlashUploadUrl = '/ckfinder/core/connector/php/connector.php?command=QuickUpload&type=Flash';
};

or alternatively you might this code in the HTML page where textarea is replaced with CKEditor:

<script type="text/javascript">
    CKEDITOR.config.filebrowserBrowseUrl = '/ckf20c/ckfinder.html';
    CKEDITOR.config.filebrowserImageBrowseUrl = '/ckf20c/ckfinder.html?type=Images';
    CKEDITOR.config.filebrowserFlashBrowseUrl = '/ckf20c/ckfinder.html?type=Flash';
    CKEDITOR.config.filebrowserUploadUrl = '/ckf20c/core/connector/php/connector.php?command=QuickUpload&type=Files';
    CKEDITOR.config.filebrowserImageUploadUrl = '/ckf20c/core/connector/php/connector.php?command=QuickUpload&type=Images';
    CKEDITOR.config.filebrowserFlashUploadUrl = '/ckf20c/core/connector/php/connector.php?command=QuickUpload&type=Flash';
</script>