i changed at the webconfig settigns from the editor the ref of the css file to:
EditorWysiwygModeCss="CuteEditor.css"
put the css file into the root from the dnn isntallation and the styles from there also into the skin css file.
now i can put the styles from the dropdown box like at the screen
but when i select a text area and choose a style i dont see a change of the color, but when i look into the html code it is correct with a span tag and the selected css-class for example: <span class="monidalVioletBold">Lebenslagen sind</span>
why cant see the user the changes of the color at the wysiwyg view.