I think you need to check: "Show data points for groups of records when sorted."
And make sure you do a sort on the Party, I think, or whatever it is being grouped by.
Ok thanks ... yes, got it to work .. once you do the above and you need to make sure that 1) select the box for "Show data points for group of records when sorted" and 2) sort the records by the field in Label Data, that is "party" ... so, once you perform the sort the chart appears correctly.
Unfortunately I still find the process of creating charts rather awkward -- your cannot seem to specify the exact Color you want for particular slice -- you have to use a theme -- and you need to create a database variable to get this to work -- as it does not work with the Count method.
Charting is a feature brand new to just the latest version of FileMaker. It is still very much in its infancy. You can, of course, request additional features for charting if you wish: http://www.filemaker.com/company/feature_request.html