Excel 2003 SP1

Trying to create a chart using VBA. The following two subs are edited a bit
after being created by the macro recorder.

The send sub errs on this line:
ActiveChart.SeriesCollection(2).Values = "=Sheet1!R12C3:R22C3"

With the error:
Run-time error '1004':
Unable to set the Values property of the Series class

Column 3 is just a series of numbers. Strangely, the first
ActiveChart.SeriesCollection(1).Values line works OK, but then the 2nd
fails.

I can't figure it out...

Sub area_chart()
'
' area_chart Macro
'

'
Range("A1:C72").Select
Charts.Add
ActiveChart.ChartType = xl3DAreaStacked
ActiveChart.SetSourceData Source:=Sheets("Sheet1").Range("A1:C72"),
PlotBy _
:=xlColumns
ActiveChart.SeriesCollection(1).XValues = "=Sheet1!R1C1:R72C1"
ActiveChart.Location Whe=xlLocationAsObject, Name:="Sheet1"
ActiveChart.Parent.Name = "Area Chart"
End Sub

Sub area_chart2()
'
' area_chart2 Macro
'

'
ActiveSheet.ChartObjects("Area Chart").Activate
ActiveChart.ChartArea.Select
ActiveChart.SeriesCollection.NewSeries
ActiveChart.SeriesCollection.NewSeries
ActiveChart.SeriesCollection.NewSeries
ActiveChart.SeriesCollection.NewSeries
ActiveChart.SeriesCollection.NewSeries
ActiveChart.SeriesCollection(1).Values = "=Sheet1!R1C3:R11C3"
ActiveChart.SeriesCollection(1).Name = "=""CRITICAL"""
ActiveChart.SeriesCollection(2).Values = "=Sheet1!R12C3:R22C3"
ActiveChart.SeriesCollection(2).Name = "=""MAJOR"""
ActiveChart.SeriesCollection(3).Values = "=Sheet1!R23C3:R33C3"
ActiveChart.SeriesCollection(3).Name = "=""MINOR"""
ActiveChart.SeriesCollection(4).Values = "=Sheet1!R34C3:R44C3"
ActiveChart.SeriesCollection(4).Name = "=""NORMAL"""
ActiveChart.SeriesCollection(5).Values = "=Sheet1!R45C3:R55C3"
ActiveChart.SeriesCollection(5).Name = "=""UNKNOWN"""
ActiveChart.SeriesCollection(6).Values = "=Sheet1!R56C3:R66C3"
ActiveChart.SeriesCollection(6).Name = "=""WARNING"""
Windows("vpo_report.xls").LargeScroll Down:=-1
End Sub