Nokia dB reflashing

I have just purchased a Nokia Debug dBox from Germany, I did a service scan and all was fine a week later i have lost some of the channels. I think i need to do a reflash but i am new to this and i am looking for instructions on how to do this can anyone help ,
regards

 

try here:

http://techno-source.co.uk/phpbb/index.php

 

Thanks I will try this link thanks for your response