Cox must not like the IP address of your provider in South America. As a shot in the dark, you may have to call Cox to setup some type of forwarding rule for an account you can access from South America.
BTW...I was stationed in Manta for a year...LOVED it!
Thank you for reaching out to Cox Forum Support. We have an additional layer of security on the account when accessing the account from outside of the US. Please send an email to email@example.com with your full name, street address, and username then we can assist with access. Please provide the information listed below in your email. Thanks
What Country is the Customer Located in?
User ID that cannot log in:
IP address (You can get this from http://whatismyip.com)
Is this IP address issued via DHCP or is it static?