Actual filename does not appear in pop-up dialog box during download

Hi all,

I've developed a simple file download system. I noticed that in some clients, the actual filename don't appear in the file download dialog box, instead the name of the page appears. In my PC, the actual name appears but when I accessed the system in other PCs, the name of my aspx is the one that is displayed.

Is this just browser's settings? I can't remember I modified some settings in my PC.

Please help.