Talon CAN bus IoT extender + mangOH green doesn't work?!

I have:

-mangOH green
-wp7607 module
-Talon CAN IoT extender

So, I’ve been trying to get the hardware working for two weeks, but the console always says “cannot find device can0”. Now I have noticed that the led relating to the talon (led 5) is always off. Could this be the problem? Do I need to do any particular installation when I insert Talon in MangOH green? Or should I consider the assumption that the hardware is damaged? I do not know what to do…