I have an HTC Droid Eris and I recently downloaded the Whereyougo application. I downloaded a couple cartridges, and the tutorial cartridge and they register on the application. However, whenever I go to play it warns me that my "gps signal is not optimal." I have attempted this in broad daylight in an open field with not a cloud in the sky. I use my phone for geocaching so I know the GPS works fine and is always on the money and quick to update. How can I go about setting up my application, maybe changing settings or dowlnoading another app, in order to run correctly?