Chartcontrol - Add AxisX Labels below the bars

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C#

Hello!
I use this code:

chartStatistic.DataSource = _manager.myPointList;

Series series = new Series("seriesName");

series.XValueMember = "Date";
series.YValueMembers = "Count";

chartStatistic.Series.Add(series);

Every Element of myPointList has a date value and a count value.
Problem:
The date values are not below the bars in the chartcontrol.
Chartcontrol shows 14 bars but only 8 Dates. How can i do this?

Regards