PIC Landinglight problems

Hi to all! First i really have to say that i enjoy flyiing with the POSKY Planes, it is a pleasure to use this performance on my sim. But now i have a small problem. My landinglights are working very well and i am happy that there are now some, but during cockpitpreparation but at least at engine start i hear the sound of pushing a button and i cannot operate any lightswitch anymore. Also my secondary engine announciaterpanel is blank. Further the switched landinglight are off too. This last until takeoff and posetiv climb. Then there ist this pushbutton sound again and i can operate normaly. So whats wrong? Maybe somebody could help me. I am using FS2002 PRO, winXP Pro and i did the merge with the POSKY panel. Thanks a lot for your support and i hope that somebody could make a christmas present to me. Happy landings and merry christmas to all Klaus