Accessing PivotChart SeriesCollection with a Sub - excel

Question

I am quite new to VBA. I have written a macro which creates about 10 pivot charts and some normal charts after filtering and cutting some data from a database spreadsheet. I now want to write a sub which goes through applying the same formatting to each one. The sub is as follows:
Sub FormatChart(Cht As ChartObject, title As String)
Cht.Activate
MsgBox ActiveChart.SeriesCollection.Count
With ActiveChart
.HasTitle = True
.ChartTitle.Text = title
.Axes(xlValue).HasMajorGridlines = False
End With
ActiveChart.SeriesCollection(1).Select
With Selection.Format.Fill
.Visible = msoTrue
.ForeColor.RGB = RGB(255, 182, 0)
End With
End Sub
I originally didn't include all the activates and selects, but couldn't get the macro to work without them and don't see it as the end of the world - the datasets are never going to be massive so speed isn't so much of a concern, and I disable screenupdating so that users can't click on cells/other objects and disrupt the macro as it runs.
Here's my problem. If I take out the second With loop, everything proceeds perfectly and the gridlines are removed and the title is added. However, whenever I try to edit the colours of columns with the above I get Run time error '1004': Invalid parameter. I've also tried keeping the content of the second with loop inside the first but then moved it out to try using selection to see if it made a difference.
I've fiddled around quite a bit and recorded various macros changing the colour of the chart in question, but I think the problem might be to do with referencing SeriesCollection as when I try to debug with
MsgBox ActiveChart.SeriesCollection.Count
I get "0".
Please let me know if I'm missing the point - as I said I am new to VBA and am trying to learn as much as possible :)
EDIT: The solution was that I was passing each chart to the above sub after I had created the chart, but before I had set a data source for the chart. Doh!
This obviously meant that there were no seriesCollections for that chart, hence the error I was getting.
I marked Joehannah as answering the question (even though it isn't technically the solution) because it made me check my code and notice that the above could be causing the problem - if I shouldn't do that someone please tell me and I'll try to fix it!

Answer 1

You are better off using Set cht = (create chart object) for each chart and then Immediately calling the format method passing in cht.

Answer 2

I have been told to post my own answer since I figured out the issue.
I was passing each chart to this function just after creating it, as follows:
Set ptr1 = Sheets("withinBRSPivots").PivotTables("UniqueClicks").TableRange1
Set cht1 = Sheets("BRS Overview").ChartObjects.Add(Left:=950, Top:=500, _
Width:=400, Height:=300)
cht1.Name = "UCChart"
Charter.FormatChart cht1, "Average Number of Unqique Clicks"
I then set the source data for the chart after doing the above. This meant that when the chart was passed to my chartformat sub, it had no source data. This is what resulted in being able to edit the title and gridlines, but not the seriesCollection. The fix was to just move the FormatChart sub line to after I had set the source data.
Many thanks to everyone who posted answers!