Hi, I bought an audi a4 b5 1997 and have been fixing the issues. Im trying to fix the keyless entry as the remote is not opening the car but i had the key checked and it works fine and its sends the signal and the central lock pump works fine as i recently changed it. Does anyone know what the problem could be as I also tried to use the 2 key system to fix the issue and it did not work? Thanks.