config.enterMode : CKEDITOR.ENTER_BR; not working

Hi, i'm just trying CKEditor 3 for the first time. I've downloaded the latest version.

I want to enable ENTER_BR mode but it seems to cause a javascript error and the editor is not drawn on the page.

HTML:

<TEXTAREA NAME="tracklisting"><?=$tracklisting?></TEXTAREA>
<script type="text/javascript">
CKEDITOR.replace( 'tracklisting',
{
toolbar : 'MyToolbar',
height:"200", width:"455"
});

</script>



config.js:

CKEDITOR.editorConfig = function( config )
{

config.toolbar = 'MyToolbar';

config.toolbar_MyToolbar =
[
['Source','-','Paste','PasteText','PasteFromWord','-'],
['Bold','Italic','Strike','-'],
['Link','Unlink'],
];

config.enterMode : CKEDITOR.ENTER_BR;
};


Everything works as normal until I add the "config.enterMode : CKEDITOR.ENTER_BR;" line to config.js

I'm using Firefox 3.5.5 - have I written this correctly or is there a bug?

Thanks
Ashley