I would recommend this advice as well. Deployment for Rails apps isn't as simple as uploading something to a remote server.

Here are some links specific for rails deployment:

http://www.capify.org http://www.modrails.com/

This is specific to hostingrails (a rails hosting company), but it's the simplest tutorial I've found...

http://www.hostingrails.com/wiki/1/How-to-deploy-a-Rails-app...

Some other technologies that you may need:

http://en.wikipedia.org/wiki/Fastcgi http://en.wikipedia.org/wiki/Apache_HTTP_Server http://en.wikipedia.org/wiki/Mongrel_%28web_server%29