What do you mean that you can't press the button to lock the doors? They won't lock, they set off the alarm, or nothing happens?
It's been awhile and I can't remembering the wiring, but when I had a TT in my bugeye my workaround for alarm/TT conflicts was:
1 - park the car and keep it running
2 - let any passengers out
3 - lock all of the doors with the power doorlock button
4 - manually unlock just the driver door by pressing the switch not the power-button
5 - turn off the car...the TT will keep it running
6 - get out and close the driver door
7 - use the key to manually lock the driver door
See if this works for you. Any other scenarios would set off my alarm.