elRTE

Hi
I have successfully integrated elrte and a standalone elfinder (2.0), and tried to add elfinder to the filemanager button in elrte.
However, that button is not visible in the toolbar, nor in the upload image window.
Anyone familiar with that 'problem' ?
Has nothing to do with elfinder itself, the button simply doesn't appear

Further, on Firefox, I get a message:
Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIDOMHTMLDocument.execCommand]
[Break On This Error]

this.doc.execCommand('styleWithCSS', false, this.options.styleWithCSS);

Code (when trying to combine elrte 1.3 and elfinder 1.2) according to wiki:
$().ready(function() {

var opts = {
                absoluteURLs: false,
                cssClass : 'el-rte',
                lang     : 'en',
                height   : 420,
                toolbar  : 'complete',
                cssfiles : ['../scripts/elrte-1.3/css/elrte-inner.css'],
                fmOpen : function(callback) {
                    $('<div id="myelfinder" />').elfinder({
                        url : '../scripts/elfinder-1.2/connectors/php/connector.php',
                        lang : 'en',
                        dialog : { width : 900, modal : true, title : 'elFinder - file manager for web' },
                        closeOnEditorCallback : true,
                        editorCallback : callback
                    })
                }
            }
            $('.editable').elrte(opts);
        })

Thnx