Amend Chart Data In Multiple Workbooks

In my VB6 project I need to loop through several Excel Workbooks with the same chart format and amend the chart data as required from time to time. There are 2 charts in Sheet2 of every workbook. With the following coding, I can only update the chart in the first workbook but not the one in the second workbook and the rest. It appears that there will be no further updates after the first workbook is closed.

Option Explicit
Dim oEquityWB As Excel.Workbook
Dim oEquityWS As Excel.Worksheet

Public Sub AmendChart()
Dim arrWorkbooks() as String'Path & Filename
Dim nn as Integer

For nn = 0 To UBound(arrWorkbooks)
If Not EquityWBOpen(arrWorkbooks(nn)) Then GoTo Next_nn
Set oEquityWS = oEquityWB.Worksheets("Sheet2")
oEquityWS.ChartObjects("Chart 1").Activate................