fckstyles.xml

I've searched the forum and looked at the wiki and it doesn't seem to be helping me. Maybe I'm just dumb, but this is my problem.

Within my config file is;

FCKConfig.StylesXmlPath      = FCKConfig.EditorPath + 'fckstyles.xml' ;

Which is I assume pointing to the default fckstyles.xml page?

I have edited the page for testing and it doesn't seem to be working

<Styles>
   <Style name="Strong" element="strong">
       <Attribute name="color" value="#ff0000" />
   </Style>
   <Style name="Bold" element="b">
       <Attribute name="color" value="#ff0000" />
   </Style>
</Styles>

Thats my styles, very simple, just trying to get the bold to go red. It isn't working, is there something else I need to change?

Thanks