Lock Screen Password under Gnome (Knoppix 6.1)

Hi,
can anyone say me, what is, the hell, the password for unlocking of the screen on the gnome-desktop of Knoppix 6.1 live?
And please, don't say me, I don't need any password. It would be not true.
After 10 minutes no activity the screen will be locked (default setting) and without the input of correct password, the only thing you can do is using of the RESET-Button.
You could alternatively use a hammer, but this would not be the best expert problem solving, I think :twisted: