GPS Module not sending data on Puck.js

Hello,
I bought the GPS Module Ublox Neo 6m (GY-NEO6MV2).
Then I connected it the following way to the Puck.js:
GPS Module -> Puck.js
RX -> D28
TX -> D29
VCC -> 3V
GND -> GND

The red LED on the GPS module is lighting.

After that I wrote a small program:

Serial1.setup(9600,{tx:D29,rx:D28});
var gps = require("GPS").connect(Serial1, function(data) {
  console.log("DATA", data);
});

Unfortunately there is no output in the console. Doe you have any idea what could be wrong? Are there methods to check what might cause this problem?