If there is a PIN set on your dreambox and you've forgotten it you can find it using DCC (see DCC) o TuxCommander (also known as Tuxbox Commander). Most images have this plugin and it’s accessable via the plugins menu. If you don't have it you will need to install it.
Start DCC (see DCC) and go to FTP
Follow and go to:
/var/tuxbox/config/enigma
and find a file called config.
View it and look for lines similar to these, but with hex values after the =
i:/elitedvb/pins/parentallock=
i:/elitedvb/pins/setuplock=
These are hex numbers.
Use your windows calculator in Scientific mode, click on Hex, enter the value in your file (last 4 numbers, not with the zeros in front of them), click Dec and that is your PIN.