Radiant with Rails 3

Hi all,
I wanted to try out Radiant locally. From official source:

“script/server -e production”
internal:lib/rubygems/custom_require:29:in require': no such file to load -- script/../config/boot (LoadError) from <internal:lib/rubygems/custom_require>:29:inrequire’
from script/server:2:in `’

What to do? I tried all what I read in mailing list and Stackoverflow
but
nothing worked, but all was for earlier versions. Can it be Ruby or
Rails
version problem?
Thanks a lot,
gezope