Just so you understand you can create your own nav and sublinks links all you want but make sure under the classifieds plugin that the plugin that sets the navigation main element that you place the proper name of your master classifieds link. You will see in our plugin how we do it. You just need to update that to the name of your link if you know how to do things in your custom style.
I am just trying to help here
based on what you have shown you have yet to have an active classifieds navigation system on the vb