File Download UI element - file Name problem

Hi,

I have a file download UI element in my application, when I download a File, I want file name should appear as "Report.xls". I am passing the same as shown below:

IWDResource resource = WDResourceFactory.createResource(<byte dat>,"Report", WDWebResourceType.XLS);

But the problem is when I download the file, the file name appears strange and changes every time and it looks something like this..CA0HU7W9.xls.

Please let me know if there is any alternate way to name the file.

Regards,

Patana