[Simple]

You don't need to be connected to the internet to use the device...

You need the correct RPO number for proper communication. This is a 4 or 5 digit number below the tyre pressure at the driver door which signify the manufacturing date. If you have the manufacturing date of your car (you don't have to be very accurate), you can deduce it using this tool:
http://www.cats-citroen.net/citroen/organumber.html
13203 will give you Jan 1 2013 and 13567 will give Dec 31 2013. Notice that it is a daily counter 18, you work your number out now..
This number signify the components used in building the car. Hence, the above will work if Latin America's production is identical to Europe and they don't use alternatives (in which case you could try a Peugeot equivalent) or chance a different number...

Of course, you could have a faulty device, but you can try it on a different Citroen or Peugeot model before going down that rout.