I bought a TS408 and registered it this week, it couldn't do what I need it to so I purchased a TS601 after talking to a Autel rep who said it should. I just received it today and wanted to register and update it, after plugging it in to the computer it asked if it could change the ID and I clicked yes, after that the unit stopped working and said vehicle authoriztion not allowed, obtain vehicle authorization and shows OK in the bottom left. no button I push is accepted, and it wont let me register it online as well, needless to say I am not very happy at this point after spending a total of about $500 for the 2 devices of which one is inadequate and the other is not working.