Trade is not allowed - Error. Any sugestions?

[Forex Trader]

//+------------------------------------------------------------------+
//| fortune-fifty.mq4
//| total. [e-mail]
//+------------------------------------------------------------------+
#property copyright "Copyright C 2005, MetaQuotes Software Corp."
#property link "http://www.metaquotes.net"

extern double Lots = 1;
extern int StopLost = 10;

#include <stdlib.mqh>
//+------------------------------------------------------------------+
//| script program start function
//+------------------------------------------------------------------+

int ticket;

double ema10 = 0, ema20 = 0;

int start()
{
while(true) {

MathSrand(LocalTime());
double rand = MathRand()/32767;

RefreshRates();

ema10 = iMA(NULL,0,10,0,MODE_EMA,PRICE_CLOSE,0);
ema20 = iMA(NULL,0,20,0,MODE_EMA,PRICE_CLOSE,0);

if( rand < 0.1 && ema10 < ema20 )
{
ticket = OrderSend(Symbol(),OP_SELL,Lots,Bid,4,Bid+StopLost*Point, Bid-StopLost*Point,"m",255, 0, CLR_NONE);
if(ticket>0)
{
if(OrderSelect(ticket,SELECT_BY_TICKET,MODE_TRADES)) Print("SELL order opened : ",OrderOpenPrice());
}
else
{
Print("Error opening SELL order : ",ErrorDescription(GetLastError()));
}
}
else if( rand < 0.1 && ema10 > ema20)
{
ticket = OrderSend(Symbol(),OP_BUY,Lots,Ask,4,Ask-StopLost*Point,Ask+StopLost*Point,"m",255, 0, CLR_NONE);
if(ticket>0)
{
if(OrderSelect(ticket,SELECT_BY_TICKET,MODE_TRADES)) Print("BUY order opened : ",OrderOpenPrice());
}
else
{
Print("Error opening BUY order : ",ErrorDescription(GetLastError()));
}
}

while (OrdersTotal() > 0)
{
Sleep(1000);
}

Sleep(10000);
}

return(0);
}
//+------------------------------------------------------------------+

[Forex Trader]

check Allow Live trading in the expert properties

[Forex Trader]

thanks