Wow.. with chrome I have just removed the old password, then I saved again and it works.
With IE there is no possibility to remove a single password, so I have to remove ALL passwords... some alternative way??
I tried (with IE) to save again the password but it doesn't work.
Thanks.
PS.: I not use FF because I use Chrome daily, IE for some particular web site, and so, I cannot have a specific browser for specific operation, it's ridiculus!! XD XD