Custom styles

Hi,

I've added in a custom fckstyles.xml file a new style:

<Style name="File path" element="span">
  <Attribute name="class" value="filepath" />
</Style>

... and added a CSS file with FCKConfig.EditorAreaCSS.

Content of the file:

.filepath {
  color: #FF0000;
}

In the Styles DropDown the Style is displayed correctly, but in the editor the text is not red.

What's wrong?
Any hints?

greetings
Dirk Einecke