Greg,
thanks for responding....
Yes, I know that the attach control permits you to specify which file
extension you can attach... I've set no limitations neither specified any
kind of extension.
The problem is that sometime you can see the files and sometime you can't.
Instead if you browse to the directory containig them and just type the file
name (without actually seeing it in the browser) the file is correctly
attached to the form.
It is something weired but really cannot figure out what's wrong