could someone help suggest a cause? my default radio stacks work fine,able to select and alter stand-by frequencies,but addon panels, i have several , have the standby frequency with ( - - - - ) where a number should go,and is unalterable, hence i cannot select a freq.so i cannot enter an ils ,or other freq.Help would be appreciated.i am also having trouble getting interior sounds while in cockpit view.i am using windows xp, pentium4 ,ge force 4 ti 4800

Check your aircraft.cfg Radios section to ensure that the standby frequency feature is turned on.Com.1=1, 1Com.2=1, 1Nav.1=1, 1, 1Nav.2=1, 1, 0Adf.1=1The second sets of ones set the standby freq feature.Milton