I have got the computer conected to the car, its just when i go in to the program an try to comunicate with the car i get a dialog box comming up and asking whitch port i whant to use, i usually get a choice of three ports depending on the program, com1,com2 and com3 there is nothing there about USB's. would it be possible to get a adapter for it to fit on the 25 pin printer port? and will it work?