Chart Data

I have a scatter chart that references data indirectly. Each cell in the chart range is a formula:

=if(B5<>0,B5,"")

for example.

The problem is that even though the cells show as empty, they get plotted on the graph as 0. What do I need to do to the formula to make it not plot those points? I tried going into TOOLS, OPTIONS and selecting the chart tab but it is already set to PLOT VISIBLE CELLS ONLY and PLOT EMPTY CELLS AS: NOT PLOTTED.

Thanks