xbee series2 not communicating

1.the frim by default loaded was zibee router /end decice AT,i got this when i pressed modem config tab
2.the error iam getting is
modem type :ok
communication with the modem…lost
unable to perform the write parameters
…this is what iam getting when iam trying to change the frimware to zigbee coordiantor AT.
3.MY pc settings are
4.iam trying to update the xbeee modem by placing it on devboard which is shown in the pic .

whats actually the difference between the dev board shown in the pic and rs232 adapter;i think both are same.

Refer to the instructions given in the following link, http://todigi.blogspot.in/2010/05/xbee-obituaries-xbee-returns-from-grave.html