Urgent help needed with FTP CURL

Hi

I need a small script to be able to fetch all the contents of a given directory, and copy them to my local directory.
I believe I need something like below, but this isn’t working for me.
I really could do with some help on this!

do shell script"
curl ‘ftp://USERNAME:PASSWORD@WEB_SITE.co.nz/Folder/Folder/Folder/. /Volume/Folder/Folder/.’ "

Cheers

Roy