I tried to help a member a short while ago and my lead wouldn't read his car. it was a 2004 2l diesel. mine is a 2004 316ti and worked the day before but when we plugged it in to his car and turned the ignition on it wiped my computer out. so I lent him the lead to use with his program and he said it didn't work until he configured it to his car. he said the lead worked and sorted his car out at the time. Now he put the lead back to how it was before he took it. I tested it today and it no longer works with my car? any ideas how to fix this?