Why the file is not as same as the source file?

At first,this is very good.I use it to make
one web file manager.But when i use i have one trouble.I found some type files not as same as the source.I only modified the path in webexplorer.asp .One time I uploaded one pdf file but i downloaded from the web then found the two file is not same!!Not all file tyies but many eg *.pdf,*.zip,*.doc etc.Why? How can i do?By the way my host is use chinese window and my computer5 is use chinese window too.You can test these in the URL:http://onedot.shlytech.com/webexplorer/webexplorer.asp

This was discussed Install it on Traditional Chinese Win2000 server. Microsoft's File System Object's file saving functions doesn't work properly on chinese Windows. It will be fixed with the next version.