Response.Write filename local langugage problem

[Bill]

Hi.

I have set a page that reads a file and send it to the browser with the follow commands:

........
Response.ContentType = "Application/x-msdownload"
Response.AppendHeader("content-disposition", "attachment; filename=" & myFileName)
Response.WriteFile(FilePath)
Response.End()

The file is sent without problems and the user is availlable to download it. The only problem is that if
filename is in my language (Greek) when prompted to save the file it gets some wired chars instead of
the correct chars in Greek language.
I have set the pages' to Greek-ISO the charset and to the Greek culture as well, but also didn't help at
all...
Any ideas?
Thanks in advance...