Problem with gps (EM408)


I have a problem: I wrote a proram for a gps but it doesn't work with the gps that I need to use.

I use a Arduino Fio and the gps is the EM408. To connect the gps with the fio, I use a gps-shield (GPS-10710) and a connector (GPS-08297). The only thing a get are stars on my serial monitor. But when I use the EM406, it works.

For what I need to do, I can't use the EM406, because the Fio works on 3,3V and the EM406 at 5V. So I need the EM408, this one works on 3,3V.

Does someone know how I can solve this problem?