Problem installing salted_login

Hi.
I am trying to install salted_login.

Executing "ruby script/generate salted_login User Location"
the following error occurs:

create app/views/layouts/scaffold.rhtml
No such file or directory -
F:/InstantRails/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/
lib/rails_generator/generators/components/scaffold/templates/layout.html.erb

There is a file layout.rhtml at this place - but no layout.html.erb.

I am a newbie - perhaps there is a problem anywhere else - but where?

Thanks
Jens