When I read page one of this post I thought this was a wind up or was going to become a legendary thread much like the guy on the Pug forums who attached his induction kit to the outside of his airbox on his 106 and wondered why it didn't make more noise!
But this is what I love about this forum. The guy has a genuine (although self inflicted)
problem and numberous members have posted to
help him out.
Cupra.rich you need to get the right cable for your car AND the software. Get the combo wrong and it won't work. As DMSTTA said rosstech is a good place to start.
Good Luck!