Upgrading ZigBee to Digimesh

Hi,

My problem is that I can’t upgrade the firmware. In the X-CTU I select the firmware modem “XBP24-DM” and when I click on “write” I receive a message saying

Getting modem type…OK

Programming modem…Flash checksum error failed

Write Parameters…Failed

My Hardware is the XBP24BZ7SIT-004, is an Xbee PRO Series 2. The default firmware is XBP24BZ7.

Any suggestion? I tried everithing!

Thanx