sudo in a windows script

I need to do SFTP with winscp.exe.

with the application i can easely copy the files with the option in "SFTP server" with "sudo su -c /bin/sftp-server" !

I try do to the same in a script without success on windows 2003 and 2008 r2 environment !

Thank you to help me to find a solution.

place your script here, remove any usernames, passwords or server names.