Rails upgrade from 1.1.6 to 1.2.3

I have just finished rails and gems upgrade and it was surprisingly smooth. There were just one minor issue.

The server was not able to start. It was teling me something like:

The solution was trivial. We are using an object Recconfig to store configuration of the web site. We do load and initialize the object in the environment.rb. In the 1.1.6 it was enough to write

in the new version it was necessary to require it.