How do you set the right day for the alarm to go off? when I try to set the alarm a green light lights up above sat and above sun for alarm s1 and 2 . I cannot download the manual so I do not know which buttons to push. How do I tell the clock to set the alrm for a particular day on 1 or on 2. Just pressing alarm 1 for example and then pushing down again ont eh button does not get rid of the day with the green lights.