Read data from MCP9808

another problem

I have try to upload this code

I2C1.setup({scl:D25,sda:D26, bitrate: 60000});
var mcp = require("MCP9808").connect(I2C1, 0b000); // 0b000 means A2 = A2 = A1 = GND 
var temperature = mcp.getTemperature();
console.log("Temperature: " + temperature + " C");

function ReadTemp() { 
setInterval (function()
             {
  var temperature = mcp.getTemperature();
  console.log("Temperature: " + temperature + " C");
  digitalWrite(LED1,1);
  }
  ,1000);}

digitalWrite(LED1,0);
ReadTemp();

I get no error while uploading ,
just see the bar running , then "SENT"
see the

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then nothing - the device is not replay
nothing on the console , can't write nothing on it

I don't get any error - but it doesn't uplaod the code
after reboot from power - It run the old code (the one on the first post)
how could it be ?

Thanks ,