SpreadsheetConverter for HTML supports 2D-charts: bar, column, pie and scatter.
SpreadsheetConverter for Java/JSP and ASP&ASP.NET only supports charts for pure HTML pages.
It seems that Excel automatically hides the chart if the underlying table is hidden. Solution: move the table to another worksheet.
You have to copy the swf-file to the same location as the web page? If you forget that, you get a black rectangle.
Flash 8 and 9 have some extra security checks which will prevent testing from the local files system.
Do not be alarmed, this problem only occurs during testing and will not affect your customers and other users of the published web page. You do not need to change previously generated web pages.
You need to copy the whole folder created by SpreadsheetConverter to the web server, including the file with extension .swf