PDF download by HTML page

Hi guys !

I have to set del pdf file's name when the download window of MS IE 6.0 appear in the window . . .

Some one can tell me how i can do this ???

I'm working on 4.7 release , with ITS templates .

Now the pdf appears but it don't have the file name setted . It is setted by default from sap and it have a name like this :

Axjfie343fri.... .pdf .

How i can change this ???