winscp to sftp download files ssdtbi visual studio 2013

Hi, I am using winscp to download files using ssdt-bi visual studio 2013. In the Execute Process Task argument I pass sftp://mysite.com/ /privatekey=C:\secure.ppk get /Home/SecureTransfer/*.data C:\Users\SecureDownload\ and it opens up WinSCP but does nothing.

When I use the same command in my batch file I get this error "The process exit code was "1" while the expected was "0".".

Thanks in advance......

Ione