TAdvOfficeRadioGroup, disable on button

I am using TAdvOfficeRadioGroup component and I want to disable or make invisible one radiobutton.
The code:
AdvOfficeRadioGroup1.Radiobuttons[0].Visible := False;
or
AdvOfficeRadioGroup1.Radiobuttons[0].Enabled := False;
neither works, how to do this ?

Thanks for reporting. The issue was traced & solved. The next update will address this.