I am very new to this rigging bussiness and have run into a problem with painting the weights on the lower abdomen. I am having trouble with getting good deformation in this area and am not sure what I should be doing. I am not sure but will the fact that my back root joint and hip joint are both very much in the same area cause problems with this. I have posted a couple of pics showing the problem and would be very appreciative if anyone can let me know how I go about weighting this area.

Many thanks Leon Labyk