Residual Pressure (Contours) not appearing and Fireflow not working

I have a model of a system. I am not sure why I am having so many problems with it. Everything else ran normally when I tried to do the Fire Flow I kept getting calculation errors. I went through the trouble shooting but still having some problems.  I need to map out the contours generated by the residual pressure (calculated) but when I try to generate them in the system nothing is drawn. 

Can someone take a look at my system and let me know what I am doing wrong? Is it a setting?