Ms chart date column value display problem

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.NET3.5

.NET

Hi,

I am using MS chart to display date column data from database.

My table contains the following values:

Date         Sale    Month
04/03/2011    50      4
05/20/2011    60      5

code is as follows:

Ch2.ChartAreas[0].AxisX.IntervalType = DateTimeIntervalType.Days ;
Ch2.Series[0].XValueType = ChartValueType.DateTime;
Ch2.Series[0].Points.AddXY(ds.Tables[0].Rows[cnt].ItemArray[0], ds.Tables[0].Rows[cnt].ItemArray[1]);

When I bind this data to chart it's not showing exact dates on X-axis.
It display graph but I need to display dates on X-Axis too.
Now it shows some unrelated dates on x-axis like 04/20/2011,05/17/2011 ....

Same code working for SALE VS MONTH, problem is for DATE column only.

Thanks for help in advance.