Error in DataGrid- Window Mobile c#

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C#3.0

C#

Hi I am creating a window based application (6.5) on vs2008. I am trying to bind objects property with DataGrid's cell value:

int rowCount = dataGrid1.BindingContext[dataGrid1.DataSource].Count;
            if (rowCount <= 0)
                return;
            dataGrid1.Select(dataGrid1.CurrentRowIndex);

            System.Data.DataRowView dataRow = ((System.Data.DataRowView)dataGrid1.BindingContext[dataGrid1.DataSource].Current);
            scaleAttachment = new Scale_Attachment();
            scale = new Scale();
            Scale_Details fetchScaleDetail = new Scale_Details();
            fetchScaleDetail.ID = Convert.ToInt32(dataRow.Row.ItemArray[0]);
            fetchScaleDetail.Scale_ID = Convert.ToInt32(dataRow.Row.ItemArray[1]);

For the first time it works fine but for second time when DataGrid has more than one row it gives me error:
(System.Data.DataRowView)dataGrid1.BindingContext[dataGrid1.DataSource].Current Cannot cast '((System.Windows.Forms.CurrencyManager)dataGrid1.BindingContext[dataGrid1.DataSource]).Current' (which has an actual type of to 'System.Data.DataRowViewSystem.Data.DataRowView
Any help is highly appreciated.
Thanks,
Vivek