|OK. You are not using DOS at all, are you? You are using a Windows command prompt, which is a different thing.|
Are you sure that the remote server accepts non-ASCII characters in passwords? Does it work if you type that command in manually or is it just failing in the batch file? Using non-ASCII characters in command-line interfaces is not normally a good thing as it depends upon what character set the computer is using, which may be completely different from that being used by the remote machine.