Can you help me pls? error code4109

Hi, 

 I would like to ask question regarding to error 4109 when i try to use the function OrderSend. I keep getting this error even though i checked the 'Allow live trading' tickbox. Do someone know? I'm a newbie to MQL 4 coding so please bare with me =)

 Here's the code by the way.

 I just put the alerts to check the parameter i passed. Also if you know how can i concatenate the Alerts because it takes too much line just to check the parameters. I'm curious also/ 

input double   Input1=0.01;

//+------------------------------------------------------------------+

//| Script program start function                                    |

//+------------------------------------------------------------------+

void OnStart()

{

string CP = Symbol();

double lot=Input1;

double win_price=WindowPriceOnDropped();

string comment = "Buy Limit";

double stop = 0.0;

double TP = win_price + 0.0015;

Alert ("Requesting order…");

int ticket = OrderSend(CP,OP_BUYLIMIT,lot,win_price,3,stop,TP,comment,0,0,clrNONE);

Alert (CP);

Alert (OP_BUYLIMIT);

Alert (lot);

Alert (win_price);

Alert (stop);

Alert (TP);

Alert (comment);

Alert (ticket);

if (ticket>0)

{ Alert ("Buy limit order successful!"); }

int Error = GetLastError();

      switch(Error)                             // Critical errors

        {

case 2 : Alert("Common error.");

break;                              // Exit 'switch'

case 5 : Alert("Outdated version of the client terminal.");

break;                              // Exit 'switch'

case 64: Alert("The account is blocked.");

break;                              // Exit 'switch'

case 133:Alert("Trading forbidden");

break;                              // Exit 'switch'

default: Alert("Occurred error ",Error);// Other alternatives   

        }

Alert (" Script Ended ");

return;

  }