Problem with calculator

1

I am having trouble getting my calculator working… could someone look at it…
I have been looking at it over and over again…and can not figure out what I did wrong…

I have one mc which is the buttons for the calculator
on that mc… I have code

on (release) {
_parent.keyPressed(this._name);
}

then in the main movie…
have two layers…
numbers
keys… I placed the mc on the stage… then made instances

the code I have on the keys layer…

// start by clearing the display and variables
clearAll();

function clearAll() {
display = “0”; // the visible display
memory = 0; // the buffer
operation = “none”; // what operation is happening
newNum = true; // whether to start a new number
}

// function called by buttons
function keyPressed(keyName) {

// do something different for different keys
switch (keyName) {
case "clear" : // for clear key, start over
	clearAll();
	break;
	
case "plus" : // for any operation, go to operate function
	operate(keyName);
	break;
case "minus" :
	operate(keyName);
	break;
case "multiply" :
	operate(keyName);
	break;
case "divide" :
	operate(keyName);
	break;
case "equals" :
	operate(keyName);
	break;
	
default : // all others are added as part of the number
	if (newNum) { // new numbers replace the display
		display = keyName;
		newNum = false;
		if (display == "0") newNum = true; // don't allow leading 0s
	} else {
		display += keyName; // append a digit
	}
	break;
}

}

// perform operation and prepare for next operation
function operate(keyName) {
switch (operation) {
case “none” : // this is the first number
memory = parseFloat(display); // set memory to that number
break;

case "plus" : // perform operation with memory and new number
	memory += parseFloat(display);
	break;
case "minus" :
	memory -= parseFloat(display);
	break;
case "multiply" :
	memory *= parseFloat(display);
	break;
case "divide" :
	memory /= parseFloat(display);
	break;
}

// equals operation is like a clear, but results are displayed
if (keyName == "equals") {
	operation = "none";
} else {
	operation = keyName; // remember this operation for next time
}

display = memory.toString(); // display result
newNum = true; // prepare for next number

}

I would post the fla… but guess it is too big for in here…