OrderModify returns error 130 for no reason!

I have been strugling all afternoon on a little piece of code that has no reason not to work. It is a simple fucntion to modify existing orders. Here is the code:

void test()
{
double last_tp_s=0, last_tp_l=0;
int total=OrdersTotal();
   for (int cnt=0; cnt<total; cnt++) 
   {
      if( OrderSelect(cnt,SELECT_BY_POS, MODE_TRADES)==true)
      {
         if(OrderSymbol()==Symbol() && OrderMagicNumber()==id)
         { 
            if ( OrderType()==OP_SELL)
            {
            last_tp_s=MathMax(last_tp_s,OrderTakeProfit()); 
            }
         }  
      }
   }
}

   for (cnt=0; cnt<total; cnt++) 
   {
      if( OrderSelect(cnt,SELECT_BY_POS, MODE_TRADES)==true)
      {
         if(OrderSymbol()==Symbol() && OrderMagicNumber()==id)
         { 
         
            if ( OrderType()==OP_SELL)
            {
              if(OrderOpenPrice()<last_tp_s)
               {
               Print("******************************** ",OrderType()," / ",OrderOpenPrice()," / " ,last_tp_s);
               OrderModify(OrderTicket(),NormalizeDouble(OrderOpenPrice(),Digits),NormalizeDouble(last_tp_s,Digits),NormalizeDouble(OrderTakeProfit(),Digits),OrderExpiration(),Magenta);
               }   
            }
         }
      }
   }
return;
}

Here is the Print from the log:

2008.11.10 00:51:37	2007.01.02 08:49  TrendProfit EURUSD,H1: OrderModify error 130
2008.11.10 00:51:37	2007.01.02 08:49  TrendProfit EURUSD,H1: ******************************** 1 / 1.3189 / 1.3219

As you can see from the log i have a OP_SELL order. All my doubles are normalized. The OrderOpenPrice() is well bellow the new SL. Yet i still get a 130 error. Can anyone help?