set dirty_background_ratio to present after reboot

Hi,

how could I set following command the be present after reboot?

echo 1 > /proc/sys/vm/dirty_background_ratio

echo 60 > /proc/sys/vm/dirty_ratio

I have createt a sh script and placed it in /etc/init.d/ but after reboot the setting are the old ones.

I'm working with OpenPli 4.0 but same in the 3.0

Also tried to make an ln in /etc/rc2.d/ but the same problem

Thanks a lot