Rails - Dec 2010 - keep getting "undefined method `map' for nil:NilClass (NoMethodError) " in new server

hi guys,

 I have a new development server (ubuntu 10).
I have done the following (the versions match my existing development
machine which works fine):
1. installed ruby 1.9.1p378
2. installed ruby gems 1.3.7
3. installed rails 2.3.8 (used "gem install rails -v 2.3.8")
4. manually installed my other gems including sphinx and thinking
sphinx with "gem install ..."
5. ran "sudo apt-get install ruby-dev ruby ri rdoc irb libreadline-
ruby libruby libopenssl-ruby sqlite3 libsqlite3-ruby libsqlite-dev
libsqlite3-dev"

here''s what "gem list --local" gives me:


root@ct9a-dev:~/projects/myApp# gem list --local

*** LOCAL GEMS ***

actionmailer (2.3.9)
actionpack (2.3.9)
activemodel (3.0.3)
activerecord (3.0.3, 2.3.9)
activeresource (2.3.9)
activesupport (3.0.3, 2.3.9)
arel (2.0.6)
authlogic (2.1.6)
breadcrumbs_on_rails (1.0.1)
builder (2.1.2)
i18n (0.5.0)
paperclip (2.3.8)
prawn (0.8.4)
prawn-core (0.8.4)
prawn-layout (0.8.4)
prawn-security (0.8.4)
rack (1.1.0)
rails (2.3.9)
rake (0.8.7)
riddle (1.2.2)
rubygems-update (1.3.7)
searchlogic (2.4.27)
thinking-sphinx (2.0.1)
tzinfo (0.3.23)
will_paginate (2.3.15)

problem:
=====
 When I run "script/console" and "script/server",  i keep
getting the
error below:
"/usr/local/lib/ruby/site_ruby/1.9.1/rubygems.rb:223:in
`activate'':
undefined method `map'' for nil:NilClass (NoMethodError)".

I looked at http://railsforum.com/viewtopic.php?id=40596 and the
things I did above were exactly as per the advice given in the url.
I''m really out of ideas.

How can I solve this?


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