DataSourceDateField strange behaviour in smartgwt 2.1

[smartgwtuser]

Hi,
I created datasourcedatefiled in datasource and added that to the listgrid filed. It is retriving data and saving data correctly. My problem here when I double click on the cell and when I exit out of the cell, the data in that cell is getting erased.

My code is below..

DataSourceDateField eventDate = new DataSourceDateField("eventDate", "Event Date");


The properties of Listgrid is set like this..
setAlternateRecordStyles(true);
setHoverWidth(200);
setHoverHeight(20);
setSelectionType(SelectionStyle.SINGLE);
setCanEdit(true);
setModalEditing(true);
setEditEvent(ListGridEditEvent.DOUBLECLICK);
setListEndEditAction(RowEndEditAction.NEXT);
setAutoSaveEdits(false);

and the listgridfiled is like this

ListGridField currLogDate = new ListGridField("eventDate");


Please let me know how can I solve this. I am using smartgwt 2.1 and IE6.

Thanks in advance for any help