Welcome to Justanswer.com, my name is ***** ***** I will do my best to assist you.
This is an issue I have seen many times and resolved. Before we try to repair the problem I need to ask for more information though.
To get started, I need to know what type of computer you're using.
Windows XP, Widows Vista, Windows 7, Windows 8, Or a Mac.
If it's a Mac, please check the OSX version as follows.
Click the apple sign at the top left of your screen, then click about this mac. And then where it says version, send that to me as a reply.
Also, I need to know the full name brand and model of your GPS.
Thank you for your response,
Senior Technician and Network Switching Systems Operator / Maintainer.