Arduino + Xbee + Sensor Communicate to Xbee + PC Problem

Why are you trying to do software serial on the hardware serial pins?

I search the methods of xbee communication in internet,and then i try this
ibrary(softwareserial) can transmit data to PC,but i dont know this is wrong.

Which instance is really in control of those pins?

I would like too control a led
light,lcd monitor and a relay .
Because
I change my xbee BD from 9600 to 57600, so i change here too