A few things to check (refer to the installation guide for details):
Have you confirmed that the serial port that you've physically connected the 695 to is the one that you've configured SkyView to receive serial information from under SETUP > LOCAL DISPLAY SETUP > SERIAL PORT SETUP ?
Under that serial port setup, is the rx counter increasing? If not, SkyView isn't seeing ANYTHING on that serial port, either because the 695 isn't physically connected, or it's not set to output data.
Is the 695 configured to output NMEA data? What NMEA output settings do you have configured for the 695?