XBEE, one base and two remotes

I´m using three xbee 802.15.4 with line passing, two remotes and one base. I wanna two remotes sends signal to the base, remote 1 input D0 and remote 2 input D1.

Parameters:

base:
MY 1
IA FFFF
D0 4
D1 4

remote 1:
MY 2
DH 0
DL 1
D0 3
IR 14
IT 1

remote 2:
MY 3
DH 0
DL 1
D1 3
IR 14
IT 1

With these parameters did not work. Can anyone help me?
Thanks.