help needed with id-12 rfid and arduino

i have the id-12 connected through the breakout board and to the arduino (Pins 1 and 7 to Arduino GND (ground)

Pins 2 and 11 to Arduino 5V Pin 9 to Arduino Pin 0 (RX)) I can not get any tag to show up. is there a way of checking to see if the id-12 is bad?