Problem of downloading file in IE

[Guest]

I have written the web application which allow user to upload his/her file to
server and then user can download that file back but I have found some
problem:

1. If the filenames are not english word then I need to encode this filename
with URLEncoder or HTMLEncoder everything look find but I found that when I
click "open button" then IE will open application which can open that file
such as "Note Pad". Content in that file look good but I notice that the
filename in title bar still the encoded text, IE doen't decode this filename
into original one, so I want to know how I can fix this problem?

2. If filename have more than 1 dot, IE will automaticly insert [1] before
the dot that is not the file extension but I don't want this so I want to
know how I fix this problem too?

Thanks.