CCDs are not noted for their ability to take good low light pictures. That said how low is the low light? Have you tried exposing the images for a few seconds (on a tripod of course)? Camera meters also tend to be inaccurate in the dark so that could another cause of the pictures not coming out in low light. I have taken long (10 second) exposures with my Powershot A30, they do come out but they take a long time to "post-process" probably because it has to do a lot of de-noising of the image.