Hello, good morning, I have acquired the MAXIPRO MP808 AUTEL, but I do not know if it is normal, at the time of turning on the equipment in the window where all the brands of the cars should be, it is empty, neither the models nor the brands, American , Europeans or Asians, I need to work, do a test with a TRAILBLAZER 2007 4X4 8 EDITIOB SPECIAL CYLINDERS, AND DO NOT RECOGNIZE IT, I am missing