Hello
I'll install InfoPower and I'll check it soon.
As I know TwwSpeedButton(TwwNavButton) is not inherited from standard SpeedButton, maybe it's a reason of problem.
That's true. The TwwSpeedButton implementation says:
TwwSpeedButton = class(TGraphicControl, IUnknown)
So, it descends from TGrapicControl, just as TSpeedbutton does.