oEditor.FCKConfig is undefined

Hi,

I'm not able to get the config attribute for my editor instance.
What am I doing wrong?

function FCKeditor_OnComplete( editorInstance ) {
test();
}

function test() {
var oEditor = FCKeditorAPI.GetInstance('editorDefault') ;
alert(oEditor.Name); //gets editorDefault

alert(oEditor.FCKConfig) //gets is undefined
}

I'm using fckeditor 2.6.5 with the standard js

<script type="text/javascript">
  var oFCKeditor = new FCKeditor('editorDefault');
  oFCKeditor.Config["CustomConfigurationsPath"] = "/res/myconfig.js"  ;
  oFCKeditor.ToolbarSet = "toolbar";
  oFCKeditor.Height="400px";
  oFCKeditor.Create();
</script>

Thanks