smart210 friendlyARM device ,reset during install OS

mhmalekian
we have a smart210 friendlyARM device. we want to install os on it, when
use SD to install os, boot load and began to install OS(for example linux
or wince),but during install progress , progress reset and start again ,
and repeat this cycle!
We tried to install os in USB-mode but usb connection lost during install
and connect again and this repeat frequently!
we need your help if you know any thing about this problem...