Netgear DGND3700v2 cannot save settings after restart

I have a Netgear DGND3700v2 modem. I cannot seem to save any changes to the settings, including the modems password. If i change the modem's password or ip address or any settings, it will all be fine until i power off the modem and once i power on i get the old settings which i wanted to change. I have tried to use a different browser (like chrome), i have tried to update to the latest firmware and i just cannot seem to be able to SAVE any setting on the modem. Once i power off, and power back on it always goes back to the last setting that were last saved (a long time ago) and not the settings i am trying to save. Please help...