X and Fluxbox :: Monitor suspends after inactivity

After 10 minutes inactivity, the monitor is switched off.

Is there any possibility to work arround that issue or
simply to deactivate this "feature"?

thanks for your help

http://damnsmalllinux.org/cgi-bin/forums/ikonboard.cgi?;act=ST;f=8;t=10684

original here.