Unknown Runtime Error using .export from Excel

[TerryDad2]

I have a script to dynamically generate an excel chart and export a jpg for the asp page to display. Unfortunately, the line to export the jpg generates an Unknown Runtime Error (I have found that the .publish also does the same). I have not been able to find any solution.

The asp code is on IIS5 on a Windows2000sp2 machine. The line that fails reads:
XLcht.Chart.Export FullFileName, "jpg"

I followed an example from

http://gethelp.devx.com/techtips/asp_pro/10min/10min0800/10min0800-1.asp

and used its example and get the same problem.