The link you provided shows the pins that the shield uses - pins 2, 3, and 7.
If you reuse those pins for the keypad, as you do pin 7, do not be surprised when one or the other of the devices does not work.
The link you provided shows the pins that the shield uses - pins 2, 3, and 7.
If you reuse those pins for the keypad, as you do pin 7, do not be surprised when one or the other of the devices does not work.