sturedman, When you run the upgrade tool does it recognise your player as an ADFU Device and come up with a message that your player is in recovery mode?
If it does you need to load a full version firmware as the player will not accept a dump.bin whilst in recovery mode. Once you have installed a full version firmware you should be able to the use your dump backup to fully recover your player.
You can find some full version firmware
HERE
You may need to try a few to find one that is compatible with your backup.