For the networkcard configuration lost everytime you boot is common
problem with knoppix3.4. The workaround is to edit your /etc/init.d/knoppix-autoconfig
Find line : pump -i $DEVICE >/dev/null 2>&1 &

It should look like this:

trap 2 3 11
#pump -i $DEVICE >/dev/null 2>&1 & (*comment out)
/etc/init.d/networking restart (*add this line)
trap "" 2 3 11