question on how to save dragon warrior on modded original xbox

I'm not sure if this is in the right section but we have a modded xbox with a fce emulator. I talk to the king and save it on the scrolls on dragon warrior 1 but when I turn off the system I lose everything. We haven't played it in years but we used to do something to save it. There is no reset button to hold down on the xbox system like on the nes. I have tried holding down every button while turning it off but nothing seems to work. If you could help that would be great.Thanks.