I'm guessing you are looking at the stream info outside of OpenCPN
with a utility like GPSinfo or GPSutility.
Is the boat icon grey or red? If grey, OpenCPN
is not seeing the gps
Also note the color of the upper right icon with a satellite
symbol. Green or red? Green is good to go, red means no data connection.
Check the tools settings (wrench icon) at the GPS
tab. Check to be sure the data source field indicates your puck
connection port. And note if the baud rate is correct.
Also you might connect in Google Earth
to verify function as well.
If your seeing a data stream, most likely the settings in OpenCPN need reviewing and correcting.