Autopilot not able to read gps data

[roy1]

I just got the blue robotics navigator - I plugged in the ublox sparkfun gps to serial port 3 on the navigator. I am able to view the data when I use screen and access the port through the terminal but when I check the MAVLink Inspector, it shows the defaut lat -0.0 and long 0.0, I do not know how to transfer the data or use the gps with the autopilot or the navigator. Has anyone faced a similar issue and how did you resolve it.