i have an f90bt. i had installed the cnsd_100fm update from pioneer a while back. i wanted to update my maps so i bought the cnsd 200fm. now the gps has crappy reception if any at all. the antenna is fine nothing has physically changed since the other update. the old update worked fine i just wanted the maps.i've tried reverting back to the old upgrade but the system wont recognize the sd card. i tried redoing the new one and it still wont recognize the card. does anyone have any ideas?