Client has Excel 2002 SP-1.

When she first entered an org chart by Insert | Picture | Organizational
Chart, the chart worked just fine. The client has 1 main manager, 2
subordinates, and a 2-column data of sub-subordinates. After saving the
document entitled "Book5.xls" she cannot modify the now existing chart.
When you click on it an error comes up "The macro 'Book5.xls!Object4_Click"
cannot be found."

What is this and how do we edit an existing chart? TIA!