Trying to access rails console on CentOS 6.2 with Redmine Stack installed

Hey,

I tried:

$ cd {installdir} 
$ ./use_redmine
$ ruby script/console production

...but only get this error: /opt/redmine/ruby/bin/.ruby.bin: No such file or directory -- script/console (LoadError)

"rails console" or "rails c" isn't working either...

How to do I access the rails console?

Thanks for your help.

Regards