NinjaTrader help!

[melfarmer]

I am trying to automate a very simple strategy with NinjaTrader. It is a dual moving average(always long or short) system. Unfortunately, I keep getting an error message ("Your scale out order can be a maximum size of 0"). I pulled the code off the Ninjatrader website. Does anyone either have a template code that I can alter, or any suggestions to my code? Thanks in advance, mel.

var f = new File("ES 12-04SIM-101update.txt");
var vEMA2 = new MAStudy(2, 0, "Close", MAStudy.SIMPLE);
var vEMA5 = new MAStudy(5, 0, "Close", MAStudy.SIMPLE);
var returnvalue = 0;

function preMain(){
setPriceStudy(true);
setStudyTitle("dualma cross");
}
if(f.exists()) {
f.open("rt");
var stateline;
stateline = f.readln();
f.close();
if (stateline != null){
var PosCount = stateline.split(",");
var s = PosCount[0]
var position = s.substr(1,4);

if (position == "FLAT") {
returnvalue = 0;
}
if (position == "0") {
returnvalue = 2;
}
if (position == "LONG") {
returnvalue = 1;
}
if (position == "SHORT") {
returnvalue = -1;
}
}
}
else {
returnvalue = 0;
}
function main() {

if (vEMA5.getValue(MAStudy.MA) > vEMA2.getValue(MAStudy.MA)) {
if(returnvalue == 0) {
var order = new File("order.txt");
order.open("wt+");
if(!order.isOpen()) {
debugPrintln("Could not open file!");
}
else {
order.writeln("ES 12-04,1,DAY,SELL,MKT,,,,,,,,SIM-101,");
}
order.close();
}
if(returnvalue == 2) {
var order = new File("cancel.txt");
order.cancel("wt+");
if(!cancel.isOpen()) {
debugPrintln("Could not open file!");
}
else {
cancel.writeln("ES 12-04,SIM-101,");
}
order.close();
var order = new File("order.txt");
order.open("wt+");
if(!order.isOpen()) {
debugPrintln("Could not open file!");
}
else {
order.writeln("ES 12-04,1,DAY,SELL,MKT,,,,,,,,SIM-101,");
}
order.close();
}
if(returnvalue == 1) {
var reverse = new File("reverse.txt");
reverse.open("wt+");
if(!reverse.isOpen()) {
debugPrintln("Could not open file!");
} else {
reverse.writeln("ES 12-04,1,,SIM-101,");
}
reverse.close();
}
}


if (vEMA2.getValue(MAStudy.MA) > vEMA5.getValue(MAStudy.MA)) {
if(returnvalue == 0) {
var order = new File("order.txt");
order.open("wt+");
if(!order.isOpen()) {
debugPrintln("Could not open file!");
}
else {
order.writeln("ES 12-04,1,DAY,BUY,MKT,,,,,,,,SIM-101,");
}
order.close();
}
if(returnvalue == 2) {
var order = new File("cancel.txt");
order.cancel("wt+");
if(!cancel.isOpen()) {
debugPrintln("Could not open file!");
}
else {
cancel.writeln("ES 12-04,SIM-101,");
}
order.close();
var order = new File("order.txt");
order.open("wt+");
if(!order.isOpen()) {
debugPrintln("Could not open file!");
}
else {
order.writeln("ES 12-04,1,DAY,BUY,MKT,,,,,,,,SIM-101,");
}
order.close();
}
if(returnvalue == -1) {
var reverse = new File("reverse.txt");
reverse.open("wt+");
if(!reverse.isOpen()) {
debugPrintln("Could not open file!");
} else {
reverse.writeln("ES 12-04,,AUTO ES,SIM-101,");
}
reverse.close();
}
}

}