Memory card 16gB / FAT32 not recognised by G50 / MDC. Card is visible in device info screen (holding on/off button 30sec). Naviagation display only mesage "No maps available" and that´s all, any other options are not available. I can not install any map, as internal memory is not sufficient and cannot access device to setup, as any map is not loaded. Frustrating / Disappointing. Please advice.