It could be that it needs re-coded for the functions to work (If they didn't use the original door control module).
If it was a 2nd hand door and they left the module that it came with it in, then there is a possibility that the module doesn't support the functions.
Do you have access to VAG-Com or similar diagnostic scanner?
My 1st port of call would be a module snapshot to see what features are enabled and the hardware revision. Then I would look at the wiring.
Good luck
Where are you based?