Problem with compass sensor

Hello,

I'm completly new to Arduino. Sorry for my band english. My project is to build a digital compass I've bought an Arduino Nano ATmega328 and a GY-271 sensor. Now I wired all up like written in this text: http://www.robotpark.com/image/data/PRO/91457/GY_271_ELECTRONIC_COMPASS.pdf

I also used the Sketch from the same file. But all i see in the serial Monitor is "89.79,89.56,25.63;" Again and again and again..... Even if I move, turn, tilt or rotate the sensor, it gives me the same numbers.

What is my mistake. Can I somehow check if the sensor is working?

Thanks a lot for help!

Did you bother reading the instructions about needing the HMC5583L library?

Yes, I've done that. But it just says, where I have to copy the libery. And I've copied it to the given folder.

Please read and follow the instructions in "How to use this forum".