Filename in gui_download and ws_download

Hi Friends..

if i using like this..

-

concatenate 'C:\'

syst-date

'.xls'

into mc_filename.

-

in program and gave the mc_filname as a filename in the function module.its working fine in ws_download but it was not working in gui_download function module.

so please give your valuable suggetion regarding this..

Thanks

Gowrishankar