On your att ind the left hand red flag will go away,when glideslope is captured,the top red flag is your vor lock flag,you need to be tuned into your airport glideslope freq,for the selected runway,for these to work.
as for your autopilot ias hold,if i remember correctly,this is non functional,as it is with many aircraft of this era,and type of autopilot used.
regards alan. 8-) :)