xbee 900hp rf modem does not receive any data!!!

hello

I’m using xbee 900hp rf model that is used with “mbed”.
but I can’t use this module and I can’t do anything.

I would appreciate if anyone can help me.

Regards

What voltage level does the Mbed run at? Is it using 9600 baud, 8 data bits, No parity and 1 stop bit? How are you determining that you are not receiving any data?