Dumb question regarding gyro

[Ryoken]

Well , i thought id re write this
Well , after 6 months it seems ive brought the helis out of the loft , and forgot everything I "learned" in the past , and im confused like mad.
first thing is.. why doesn't my "enter" key work on this board?.
i got the 2 small 450 scale gelis a kds 450qs with standard electronics , and a hk450 with a hk410b gyro
Kds450
i have altered the settings back to factory , with the gyro set to +50 and +60.
fire up the heli and move left stick, rudder moves but doesnt re center. same with right , you have to move rudder on tranny to re center it
same if you move the heli by hand there is no recenter.
altering idle up switch doesnt alter this , but id have thought that would alter the modes from one to another.
hk450 .
move rudder on tranny and the rudder will re centre.
move heli with hand and you get no rudder movement at all .
if i remove the single yellow wire out of the receiver the gyro works. and carries on when you stick it back in .
now if i get this right , the idle up switch alters the gyro modes , if gain is set to <50 its one mode and >50 its another, and this is controlled by htat switch , so why doesnt flicking that switch make any difference?.
ive re edited this , cos it just looked odd.

[dillwhacker]

Thats nornal for a heading hold gyro. You move the stick and the heli doesn't respond, so the gyro keeps trying. Same when you move the heli - heli doesn't respond to correction, so ithe gyro keeps trying.

[Ryoken]

just been looking on inet , (I think im having a feeling of information overload) and just getting confused at what im reading ,some of the American sites say. on the kds 7x11 TXs 0-49 gain is rate, 50 is null and 51-100 is head hold. so , working on that if its right , one position is null (gyro not working?) and headhold modeis the other switch position ,