XBEE s1 ,Pan ID of Coordinator & router set to '0' ,No association/comunication?

I am using 2 Xbee S1 modules . My aim is to automatically associate router/end node to coordinator by setting PAN ID 0 .

Case 1 .

Coordinator :
PAN ID : 3332
DH:0
DL:FFFF

Router/End node:
PAN ID:0
DH:0
DL:FFFF " No Communication "

Case 2

Coordinator :
PAN ID : 0
DH:0
DL:FFFF

Router/End node:
PAN ID:0
DH:0
DL:FFFF " No Communication "

Case 3

Coordinator :
PAN ID : 3332
DH:0
DL:FFFF

Router/End node:
PAN ID: 3332
DH:0
DL: 0 " No Communication "

According to product manual , router would search for all available networks & join one.

All tried using all the modes . AP=0 ,1 ,2 .Channel : C
Have I missed to adjust any other settings in X-CTU ? :confused: