I'm sorry to hear about the compatibility issue with your Slingbox 500. Unfortunately the Slingbox 350 and 500 have not been released in the South American and European countries due to the programming standard issues with their cable\satellite providers. Here is a link for more info on your issue.
I am aware that this article reflects information on the Slingbox SOLO and PRO-HD but the same rules apply for the Slingbox 350 and 500 as well. I apologize for the inconvenience this has caused you!
The Sling Media Moderation Team
- Clear cache and cookies (A google search with "How to clear cache and cookies on ____" where the blank is your browser will give you instructions on how to do that
- Select that you are in the United States - English
- Profit and configure the new box