Problems creating own ToolbarSets

Hey folks

I'm trying now for about 3 hours to create my own Toolbar Set but I don't get it. As an additional difficulty, I'm using a template-system called Smarty. But that's no more a problem since I found a "converter"-function in the supportboard of the smarty-homepage.

Some information:

//My entry in the fckconfig.js
FCKConfig.ToolbarSets["Custom"] = [
   ['Bold','Italic','-','Link','Unlink','-','About']
] ;

<!--Part of the sourcecode of the webpage-->
<script type="text/javascript" src="/zaunbau/fckeditor/fckeditor.js"></script>
<script type="text/javascript">
var oFCKeditor = new FCKeditor('content_text');
oFCKeditor.BasePath = "/zaunbau/fckeditor/"; oFCKeditor.InstanceName = "content_text"; oFCKeditor.Width = "630px"; oFCKeditor.Height = "300px"; oFCKeditor.ToolbarSet = "Custom"; 
oFCKeditor.Create();
</script>

Still there's an alert-box poppin' up, telling me, that there's no ToolbarSet called "Custom". Does somebody have an idea what's going wrong? I'm grateful for every hint.

Greets
Igel

PS: Excuse my English. There's a lack of experience in the use of that language practically /