I just tried to flash a 2006 Chrysler 300 from techathority.com . I paid for a three day subscription and down loaded the J2534 program from them and the flash part number file . After all that it still would not work as a passthru . The J2534 program would recognize the Maxiflash and after selecting it, and trying to start the flash an error would pop up saying " TODO> bla bla something. program failed and will shut down ". Then it would shut the j2534 program down. I checked that the windows sys config recognized the tool and tried both the usb and cat 5 cables. after 2 1/2 hours of wasting time I had to give up. I have tried everything . so what am I doing wrong???