[AS2] Variables not updating constantly

I have variables some of which have values derived from dynamic text boxes with instance names. Then some var = (calculations) and some "if" statments. Finally a final value is derived and passed to a movie. The problem is that my trace statments show that the values are calculated only once, not continuously. Does this need to be in a onEnterFrame function? I tried that but it didn't work, although I made have made a typo.

Here's the code. It's the section at the bottom starting with SunTime that doesn't work.

PHP Code:

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stop(); 

var mrotate = 0; 
var sunMinutes = 0; 
var sunHours = 0; 

//Move hands to analog minutes 
minutesB.onPress = function() { 
    var mth = 0; 
    var mxmin = 104; 
    var mymin = 91.5; 
    minutesB._x = mxmin; 
    minutesB._y = mymin; 
    minutesB.onEnterFrame = function() { 
        mth = Math.atan2(_ymouse-mymin, _xmouse-mxmin); 
        mrotate = mth*180/Math.PI; 
        minutesB._rotation = mrotate; 
    }; 
}; 

//Sets digital minutes 
minutesB.onMouseUp = function() { 
    delete minutesB.onEnterFrame; 

    if (mrotate<0) { 
        displayMinutes_txt.text = Math.round((mrotate+360)/6); 

    } else { 
        displayMinutes_txt.text = Math.round(mrotate/6); 
    } 
     
//variable for movie timeline 
    sunMinutes = displayMinutes_txt.text; 

    if (displayMinutes_txt.text<10) { 
        displayMinutes_txt.text = "0"+displayMinutes_txt.text; 
    } 
}; 

//Move hands to analog hours 
hoursB.onPress = function() { 
    var hth = 0; 
    var hxmin = 104; 
    var hymin = 91.5; 
    hoursB._x = hxmin; 
    hoursB._y = hymin; 
    hoursB.onEnterFrame = function() { 
        hth = Math.atan2(_ymouse-hymin, _xmouse-hxmin); 
        hrotate = hth*180/Math.PI; 
        hoursB._rotation = hrotate; 
    }; 
}; 
//Sets digtal hours 
hoursB.onRelease = function() { 
    delete hoursB.onEnterFrame; 

    if (hrotate<0) { 
        displayHours_txt.text = Math.round((hrotate+360)/30); 
         
    } else { 
        displayHours_txt.text = Math.round(hrotate/30); 
    } 

//variable for movie timeline     
    sunHours = displayHours_txt.text; 

    if (displayHours_txt.text<10) { 
        displayHours_txt.text = "0"+displayHours_txt.text; 
    } 
}; 


//Manual switching beteen AM and PM 
ampmmov.onRelease = function() { 

    if (ampmthing == false) { 
        displayAmPm_txt.text = "pm"; 
        ampmthing = true; 
    } else { 
        displayAmPm_txt.text = "am"; 
        ampmthing = false; 
    } 

}; 

//Code that moves playhead to correct movie frame 

var sunTime = 0; 
trace ("aa"+sunTime); 

sunTime = (sunMinutes+(sunHours*60)); 
trace ("a"+sunTime); 

    if (ampmthing == true) { 
        sunTime = sunTime+720; 
        trace ("b"+sunTime); 
    } 
     
    sunTime = sunTime-300; 
    trace ("c"+sunTime); 
     
    if (sunTime<0) { 
        sunTime = (sunTime+1440); 
        trace ("d"+sunTime); 
    }; 

trace ("e"+sunTime); 


_parent.sun.gotoAndStop(sunTime) 


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