Cabin Pressurization

Hi all,My next technical challenge is cabin pressurization.I know I could do it in L:Variables, but I thought I'd like to crack Aces thinking and get the supplied variables a try.If I use (in XML) PRESSURIZATION_CLIMB_RATE_INC, I getPRESSURIZATION CABIN ALTITUDE RATE to work ok, but only with the aircraft off the ground.Also, PRESSURIZATION_PRESSURE_ALT_DEC does not want to changePRESSURIZATION CABIN ALTITUDE or PRESSURIZATION CABIN ALTITUDE GOAL.In the aircraft.cfg file I have[pressurization]design_cabin_pressure = 8000max_pressure_differential = 8.7I'm thinking this is required to switch the system on?Would someone kindly point me in the correct direction so I can get all the pressurization variables to work.Thanks very much,nick