Trouble using RSYNC from a SSH terminal

[Francisco Álvarez Martínez]

 Hi,

 I'm setting up mirror server using RSYNC, but I couldn't find the answer...
 Why is possible to backup to my local Linux machine and why I couldn't use
 the same instruction for backing up through SSH?

 I explain: from the command line of my linux machine, I write: rsync -avuzb
 xxx.xxx.xxx.xxx::resource /home/www and it works properly. When I try to do
 the same in another machine (connected through a SSH program), it doesn't
 respond. I need to do that, because I am migrating servers and need that
 information. Do I do it directly from the destination server console and no
 through SSH?

 I need a solution, please...