I have a user running Excel as part of Office 2003 Pro. When he tries to click on a data point in a scatter chart he doesn't get the format data series box displayed. Focus is lost from the main Excel window but if you click on another application the Format Data Series box appears but none of the options can be used and nothing can be changed.

If a new chart is created the problem occurs again if the chart is a new sheet but not if it is created as an object in an existing chart.

Any ideas? TIA