Et kjent problem med flere typer GPS puck.
1. hent en ny driver her:
navibe.com
2. The driver might not be installed properly, please do the following steps for evaluation:
1.Un-install and re-install the USB driver again
2.Connect GM-720 to your laptop
3.Go to "My computer -> Properties ->Hardware -> Device Manager -> COM & LPT" to see if you can see GM-720 (or USB to Serial Com Port) on the list.If you are not sure which com port is GM-720 you can unplug and plug again to find out the correct port.