Export to Excel Issue with Date field in DS 1.5 ?

Hi DS Experts!

I face a problem in exporting a crosstab to excel in Design Studio 1.5 .

My cross tab looks like

I use a button in which I have used the following script

APPLICATION.export(ExportType.EXCEL_xlsx,CROSSTAB_1);

The exported Excel file looks like

the date colum shows value like 1/1/00

Does any one encountered this problem ?

Thanks in Advance for your replies .