Help Needed to remove version dependency

Hi All,

I have recorded a macro to generate some graphs in excel 2003. The code snippet is as follows:

Charts.Add
    ActiveChart.ChartType = xlLineMarkers
    ActiveChart.SeriesCollection.NewSeries
    ActiveChart.SeriesCollection(1).XValues = "=RawData1!R" + sRowCountStart + "C1:R" + sRowCountEnd + "C1"
    ActiveChart.SeriesCollection(1).Values = "=RawData1!R" + sRowCountStart + "C8:R" + sRowCountEnd + "C8"
    ActiveChart.SeriesCollection(1).Name = "=RawData1!R1C8"

    ActiveChart.SeriesCollection(2).XValues = "=RawData1!R" + sRowCountStart + "C1:R" + sRowCountEnd + "C1"
    ActiveChart.SeriesCollection(2).Values = "=RawData1!R" + sRowCountStart + "C7:R" + sRowCountEnd + "C7"
    ActiveChart.SeriesCollection(2).Name = "=RawData1!R1C7"

where sRowCountStart and sRowCountEnd are the variables. Now when I am executing this code with excel 2007 it is giving me the unexpected results where it is selecting all the columns available in RawData1 instead of column 1 and cloumn 7.

Is there any dependency in excel versions? Any help would be much appreciated.

Thanks in advance.