bluetooth

Do

cat /etc/bluetooth/rfcomm.conf

and post the output.

My one looks something like this:

rfcomm0 {
         # Automatically bind the device at startup
         bind yes;
         # Bluetooth address of the device
         device xx:xx:xx:xx:xx:xx;
         # RFCOMM channel for the connection
         channel 1;
         # Description of the connection
         comment "Arduino";
}

again where "xx:xx:xx:xx:xx:xx" would be the address for your particular bluetooth shield.