JXD 685 camera

I recently bought a JXD 685 PMP ( http://jxd.cc/jxd_web/en/products.asp?id=3659 ), I am very satisfied with this thing, but only one problem, the camera doesn’t work good in dark or low light conditions( but is quite brilliant outdoors in daylight conditions).

When i take picture indoors even on day the picture is very very noisy, is there any way to improve the camera, i tried all the settings but none helped, event the night mode has no effect

What could be the problem ? pleas advice.

camera not atall working

plzzzzzzzzzzzzz suggest me what could be the problem.camera not at all working.