Ibought my Via135 about 7 months ago with lifetime maps. Ihave installed My drive connect several times. it will not update maps. Every month my satnav says maps out of date. its now 20 months out of date. every time i go to my drive all i get is GPS quick fix update. i can get this message every day yet my drive says my satnav is upto date. why can`t i get new maps.