How strange, that's all I had to change for it to stay on for my car. It could well be different for right hand drive markets?
Can you confirm that when you lock the car the CH lights are on?
If so, you might try Parklicht links (beidseitiges Parklicht aktiviert li & re) instead. You have the right channel.
Let me know if this works and I'll update the VCDS wiki to reflect it. I'll try this also. If we can get one solution for both left and right hand drive markets that would be much better.