Error "Invalid Parameter" in Charting VBA Code

Been trying to figure out what the reason caused the "Invalid Parameter" error for the past 20 minutes... and still clueless. Anyway, In my worksheet I have 2 charts. In my VBA code, I defined both chart with individual seriescollection (SeriesCollection(1) for chart one and SeriesCollect(2) for chart two). However, I kept getting the Invalid Parameter at line ChtObjTELCO.Chart.SeriesCollection(2).Values = Range(Cells(UserRow, 8), Cells(UserRow, 9)) and to be honest, I can't figure it out why.

Any help is appreciated.

Below is my code and I have attached a sample workbook

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Never mind. Figure it out by an accident. Didn't realize one SeriesCollection can store several set of values

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