Unknown ticket for OrderModify function

[tradefx1]

Hi,

I'm new in coding and have the following problem : EA opens ticket #1, doesn't fix stoploss but fixes takeprofit. Then it closes #1 and opens ticket#2 and then displays unknown ticket # 1 to ordermodify function...

here is the code :

Buy :

if (Order == SIGNAL_BUY && ((EachTickMode && !TickCheck) || (!EachTickMode && (Bars != BarCount)))) {
if(!IsTrade) {
//Check free margin
if (AccountFreeMargin() < (1000 * Lots)) {
Print("We have no money. Free Margin = ", AccountFreeMargin());
return(0);
}

Ticket = OrderSend(Symbol(), OP_BUY, Lots, Ask, 0, 0, 0, "Buy(#" + MagicNumber + ")", MagicNumber, 0, DodgerBlue);

OrderSelect(Ticket, SELECT_BY_TICKET);
OrderModify(OrderTicket(),OrderOpenPrice(), OrderOpenPrice ()- SL*Point,OrderOpenPrice() + TP*Point,0,Blue);


if(Ticket > 0) {

if (OrderSelect(Ticket, SELECT_BY_TICKET, MODE_TRADES)==true) {
Print("BUY order opened : ", OrderOpenPrice());
if (SignalMail) SendMail("[Signal Alert]", "[" + Symbol() + "] " + DoubleToStr(Ask, Digits) + " Open Buy");
} else {
Print("Error opening BUY order : ", GetLastError());
}
}
if (EachTickMode) TickCheck = True;
if (!EachTickMode) BarCount = Bars;
return(0);
}
}

SELL :

if (Order == SIGNAL_SELL && ((EachTickMode && !TickCheck) || (!EachTickMode && (Bars != BarCount)))) {
if(!IsTrade) {
//Check free margin
if (AccountFreeMargin() < (1000 * Lots)) {
Print("We have no money. Free Margin = ", AccountFreeMargin());
return(0);
}

Ticket = OrderSend(Symbol(), OP_SELL, Lots, Bid, Slippage, StopLossLevel, TakeProfitLevel, "Sell(#" + MagicNumber + ")", MagicNumber, 0, DeepPink);

OrderSelect(Ticket, SELECT_BY_TICKET);
OrderModify(OrderTicket(),OrderOpenPrice(),OrderOpenPrice() + SL*Point, OrderOpenPrice() - TP*Point,0,Red);

if(Ticket > 0) {
if (OrderSelect(Ticket, SELECT_BY_TICKET, MODE_TRADES)) {
Print("SELL order opened : ", OrderOpenPrice());
if (SignalMail) SendMail("[Signal Alert]", "[" + Symbol() + "] " + DoubleToStr(Bid, Digits) + " Open Sell");
} else {
Print("Error opening SELL order : ", GetLastError());
}
}
if (EachTickMode) TickCheck = True;
if (!EachTickMode) BarCount = Bars;
return(0);
}
}

if (!EachTickMode) BarCount = Bars;

return(0);
}