helpme the trail stoploss problom

[zdj229]

double zuizongbuyzhisun=NormalizeDouble(zuidapingcang,Digits);  
                                 if((MarketInfo(Symbol(),MODE_BID)-zuidapingcang)>zuizongjiange*Point)
                                    {
                                       for(int i0 = 0; i0<OrdersTotal(); i0++)
                                          {
                                             if (OrderSelect(i0, SELECT_BY_POS, MODE_TRADES)==true)
                                                {
                                                   if(NormalizeDouble(OrderStopLoss(),Digits-Point)!=NormalizeDouble(zuizongbuyzhisun,Digits-Point))
                                                      {
                                                          if(OrderModify(OrderTicket(),OrderOpenPrice(),zuizongbuyzhisun,OrderTakeProfit(),0,White)==true)
                                                             {
                                                                Alert("多头追踪止损启动，止损价自动修改成功");
                                                             }
                                                          else
                                                             {
                                                                Print("追踪止损价设置止盈失败,错误代码",GetLastError());
                                                             } 
                                                      }
                                                }
                                          }      
                                    }

he can modyfy part of ticdet orderstoploss,and print some OrderModify error 130, why,the orderstoploss Distance ask or bid have 100 point .(one digital for 0.00001)