Vim netrw not working

Hi,
I am new to this forum. I have been using vi for quite a while. To work with remote files using vi, I am trying to do the following

vim ftp://remotehost//tmp/filename

This file exist, but i m not able to open it. I verified that the netrw plugin is in place. i have se nocp in the .vimrc. Can someone help me regarding this.

My normal FTP is working fine