NETGEAR mbr1210-1bmcns reset itself when it turned off and powered back on

NETGEAR mbr1210-1bmcns reset itself when it turned off and powered back on. i am on statice ip address from my isp and my issue witht this router is when i configure the router for my internet connection and save it saves and the internet works fine but when i put off the power on the router and put it back on the settings on the router vanishes and it seems the router has been reset which it was not. i tried leaving the router on and puting it off on the wall the same issue happens. all configuration i have saved vaniches like the router was rest. Kindly assist me on what to do i can not keep reconfiguring the router every. i save the configuration file on my computer so i just restore it daily. so if i am absent at de office it means no internet at my office. kindly help please

thank you