Anybody help me out?

Well for starters I know there was a topic about this somewhere but I'm having difficulties locating it so I'd much appreciate some help here.I've merged the posky 777 with the PSS 777 panel and everything is great all gauges showing up ,all textures, fmc, over head etc. exept my flight director switch will not move on the panel or in vc mode.The autothrottle works and LNAV and VNAV will arm but I cannot arm the A/P without first switching on the flight directorAll the xml controlled parts are working correctly so there is nothing wrong there.Any help would be appreciated.Thank youRichy