I read in a comment section of the savageelectronics blog that you have to add the softwareserial library to the sketch folder, and when i do that i get the following error:
That comment was rubbish. Before you did that, the code compiled but was not properly uploaded to the Arduino.
Problema subiendo a la placa. Visita http://www.arduino.cc/en/Guide/Troubleshooting#upload para sugerencias.
That guide has a list of steps to follow. Which step is "Complain on forum, in wrong section"?