Cannot read a table in Oracle when scaffold'ing

I installed Ruby, Rails (using gems install rails -v 1.0.0 --remote),
the OCI driver for windows to access Oracle (C:> ruby
I create a an application in rails (C:> rails tabella)
I have a table called tabella in Oracle in the RAILSDB database.
I modify my database.yml to read:
adapter: oci
username: ruby
password: ruby
I start my server: (C:> ruby server)
When I run:
C:> ruby script/generate scaffold tabella
I get an Error ORA0403 tabella object tabellas does not exist

Any hints??? feel free to email me at [email protected]