Should be 1/10 or 1/15 and ISO 1600
do u even know what the settings, 1/10s, 1/20s, f4, iso3200 means n how they contribute to the overall exposure? pls DO put in the effort to read and learn before coming here thinking that we have the perfect 'formula' or setting for u. also pls do not think that the BRAND of the camera is the reason behind the underexposed pictures. if u have tat mentality u will end up buying canon mk2 or even nikon d3. N STILL wont be able to get a good picture.
A DSLR is not a magic tool. it requires the effort of the person to maximise its powers.
PLEASE READ AND LEARN.