I have an ultrawebgrid with some columns as date column.

I have the columns datatype as datetime and the format is "MM/dd/yyyy"

But i am not able to sort correctly

e.g it sorts as string and not by column type.

This is the html for column

<igtbl:UltraGridColumn BaseColumnName="Date" Key="Date" Width="110px"
                                    AllowUpdate="No" DataType="System.DateTime" Format="MM/dd/yyyy">
                                    <Header Caption="Date">
                                        <RowLayoutColumnInfo OriginX="5" />
                                    </Header>
                                    <Footer>
                                        <RowLayoutColumnInfo OriginX="5" />
                                    </Footer>
                                </igtbl:UltraGridColumn> 

Please suggest