Opening mail attachment warning

[DanK]

When I try and open an attachment, I get a warning about
viruses, etc., and then I am given the choice of opening
the attachment or saving it as a file. There is a check
box at the bottom of the warning box that says "Always ask
before opening this type of file."

It used to be that if I unchecked the box, the next time I
tried opening that type of file, I wouldn't get the
warning box anymore. Now I always get it. Is there a
setting somewhere or a way to stop it from giving me the
warning every time????????????

Thanks!
Dan