Problem getting a module to work with services

Hi in the last 4 days I am trying to do a simple "Hallo world" module with services.
I'm using Drupal 7 with Services 3.X Working with REST Server.
I read the API doc's.
I created an endpoint on my site.
Iv'e manage to use the default node and user module's in my Services module endpoint.
The services module recognized my module and methods all, index, retrieve etc...
And when i try to view data i get white page with no content.
And I can't get any good Example of a module that works with Services 3.x.

Any idea on how to do it ??
Or a link to a nice article ???