How can I update my rails application to work with the current release of rails? For example, I had rails 0.9 and created an application. I installed the will paginate plugin and now the application can't run. I upgraded everything and created a new test application, installed the plugin and it works. However, my old application doesn't work.
So basically, what I'm getting at is, each time a new version of rails comes out, how can I update my application so that it'll reflect the current release of rails? Thanks!