Pixhawk not echanging informations by bluetooth

Hello,

I just bought a "Bluetooth Data Link Modul zu Pixhawk PIX 2.43 " for my pixhawk and I tried to connect it with Windows and Android but it didn’t work. The red light on the module stay “on” meaning connected but I can’t read any information on the computer or on my smartphone… Somebody have any idea?

-Camille