First let me start by saying thank you for a well-written module. This really saved my bacon on a side project I'm working on.

I've been tinkering with a copy of the XT Trial version of Fusion Charts and had to make some minor modifications to the Fusion Charts module to get charts to display.

Fusion Charts has different filenames for the chart .swf files in the Free and XT Trial versions. All I had to do to get XT Trial working was tweak the filenames in theme_fusionchart(). Below is my best guess attempt at getting the filenames corrected. I've tested the demo charts and the 2D line chart, the rest may or may not be correct:

$chart_file = array(
    'Column 3D' => 'Column3D.swf',
    'Column 2D' => 'Column2D.swf',
    'Line 2D' => 'Line.swf',
    'Area 2D' => 'Area2D.swf',
    'Bar 2D' => 'Bar2D.swf',
    'Pie 2D' => 'Pie2D.swf',
    'Pie 3D' => 'Pie3D.swf',
    'Doughnut 2D' => 'Doughnut2D.swf',
    'Multi-series Column 2D' => 'MSColumn2D.swf',
    'Multi-series Column 3D' => 'MSColumn3D.swf',
    'Multi-series Line 2D' => 'MSLine.swf',
    'Multi-series Bar 2D' => 'MSBar2D.swf',
    'Multi-series Area 2D' => 'MSArea2D.swf',
    'Stacked Column 3D' => 'StackedColumn3D.swf',
    'Stacked Column 2D' => 'StackedColumn2D.swf',
    'Stacked Bar 2D' => 'StackedBar2D.swf',
    'Stacked Area 2D' => 'StackedArea2D.swf',
    'Multi-series Column 2D + Line - Dual Y Axis' => 'StackedColumn2DLine.swf',
    'Multi-series Column 3D + Line - Dual Y Axis' => 'MSColumn3DLineDY.swf',
    'Candlestick Chart' => 'Candlestick.swf',
    'Funnel Chart' => 'Funnel.swf',
    'Gantt Chart' => 'Gantt.swf'
  );