Hello Steve,
Thank you for providing the sample data. Following is the resulting Pie chart:


Attached, you can also find the chart template file.
Let us know if you have any questions or if you need assistance.

Best Regards,
Nevron Support Team

Good news!  Chart is working properly.  Still don't know how to make the Labels appear on two lines.  Many thanks for your help.  You guys are awesome!

Hi Steve,
We are glad that we were able to help.
To have the labels on two, or multiple lines, you simply need to break the line in the expression editor like this:
=IF(FIRST(Fields!Total_Current_Charges)<20, "Less than 20 OMR",
IF(FIRST(Fields!Total_Current_Charges)>35, "Greater than 35 OMR", "Between 20 and 35 OMR")) + "
" +
FORMAT(SUM(Fields!Total_Current_Charges), "N0", "en-us") + "
" +
FORMAT((SUM(Fields!Total_Current_Charges)/SUM(Parent.Fields!Total_Current_Charges)), "P0", "en-us")

Best Regards,
Nevron Support Team

That was too easy!  I wish the online documentation said "How to obtain 2 or 3 line labels" on your charts.  In the expression editor for Data Labels, press enter and add a second line.  I looked everywhere in the online documentation.  Off and running, thanks!