Xbee series 2 digital output

[DatsAbk]

I am trying to turn the Digital I/O pins of Xbee 'low' and 'high' using AT commands.

I send the commands in the following sequence:

+++
OK
ATD05
OK
ATWR
OK
ATD0
5
ATCN

This stream should make my output pin 0 "high" but it does not happen so.

Do I need to configure them somehow?
Is it so that it is not possible by AT commands?

 

[horace1]

commands look OK
can you see any change on pin 20 if you do ATD04 then ATDO5
do you have anything connected to the D0 pin 20

 

[DatsAbk]

Nothing connected to the pin. No chage in output.
The firmware version shows:20A7

Today I read in a manual that 27A7 firmware indicates Router/end device digital i/o

So does that mean that digital i/o change only when it is an endpoint or router and its given a remote command?