Ruby - watir : Failed to get IEnum Interface - ruby

Question

I'm using windows XP and I need to use watir with ruby, the installation went pretty well, my last try was following the instructions here Failed WATIR installation Server 2003 and everything was ok except for this "ERROR: While generating documentation for builder-2.1.2" then the installation finished with no more problems.
The problem is when I try to run a sample script to execute a google search I got an error when the set function is called, so far I haven't found any useful information about it, if anyone could give me a hand it would be great :)
btw, here http://www.mail-archive.com/wtr-general#rubyforge.org/msg07722.html they say that it is related to WIN32OLE but they don't explain how to fix it (or at least I didn't get it :s )
The versions I've installed are
ruby -v
ruby 1.8.6 (2007-09-24 patchlevel 111) [i386-mswin32]
gem env
RubyGems Environment:
- RUBYGEMS VERSION: 1.3.7
- RUBY VERSION: 1.8.6 (2007-09-24 patchlevel 111) [i386-mswin32]
- INSTALLATION DIRECTORY: c:/ruby/lib/ruby/gems/1.8
- RUBY EXECUTABLE: c:/ruby/bin/ruby.exe
- EXECUTABLE DIRECTORY: c:/ruby/bin
- RUBYGEMS PLATFORMS:
- ruby
- x86-mswin32-60
- GEM PATHS:
- c:/ruby/lib/ruby/gems/1.8
- C:/Documents and Settings/jamontoya/.gem/ruby/1.8
- GEM CONFIGURATION:
- :update_sources => true
- :verbose => true
- :benchmark => false
- :backtrace => false
- :bulk_threshold => 1000
- REMOTE SOURCES:
- http://rubygems.org/
The error
c:/ruby/lib/ruby/gems/1.8/gems/watir-1.6.6/lib/watir/locator.rb:119:in `each': failed to get IEnum Interface (RuntimeError)
HRESULT error code:0x80004002
No such interface supported from c:/ruby/lib/ruby/gems/1.8/gems/watir-1.6.6/lib/watir/locator.rb:119:in `locate'
from c:/ruby/lib/ruby/gems/1.8/gems/watir-1.6.6/lib/watir/container.rb:838:in `locate_input_element'
from c:/ruby/lib/ruby/gems/1.8/gems/watir-1.6.6/lib/watir/input_elements.rb:5:in `locate'
from c:/ruby/lib/ruby/gems/1.8/gems/watir-1.6.6/lib/watir/element.rb:54:in `assert_exists'
from c:/ruby/lib/ruby/gems/1.8/gems/watir-1.6.6/lib/watir/element.rb:315:in `enabled?'
from c:/ruby/lib/ruby/gems/1.8/gems/watir-1.6.6/lib/watir/element.rb:62:in `assert_enabled'
from c:/ruby/lib/ruby/gems/1.8/gems/watir-1.6.6/lib/watir/input_elements.rb:364:in `set'
from Search.rb:29
The sample code (Search.rb)
I removed comments and other unnecessary lines
require "watir"
test_site = "http://www.google.com"
browser = Watir::Browser.new
browser.goto test_site
browser.text_field(:name, "q").set("pickaxe") # here is the error when set is called
browser.button(:name, "btnG").click
browser.close
gem list
just in case you need to know
*** LOCAL GEMS ***
activesupport (2.3.9)
builder (2.1.2)
commonwatir (1.6.6)
firewatir (1.6.6)
fxri (0.3.6)
fxruby (1.6.12 mswin32)
hoe (2.6.2)
hpricot (0.6 mswin32)
json_pure (1.4.6)
log4r (1.0.5)
nokogiri (1.4.3.1 x86-mswin32)
rake (0.8.7, 0.7.3)
rubyforge (2.0.4)
rubygems-update (1.3.7)
s4t-utils (1.0.4)
sources (0.0.1)
user-choices (1.1.6.1)
watir (1.6.6)
win32-api (1.4.6 x86-mswin32-60, 1.0.4 mswin32)
win32-clipboard (0.4.3)
win32-dir (0.3.2)
win32-eventlog (0.4.6)
win32-file (0.5.4)
win32-file-stat (1.2.7)
win32-process (0.6.2, 0.5.3)
win32-sapi (0.1.4)
win32-sound (0.4.1)
windows-api (0.4.0, 0.2.0)
windows-pr (1.0.9, 0.7.2)
xml-simple (1.0.12)

Answer 1

Watir can't find IEnum interface thread that you link to says:
my best suggestion is to uninstall and
reinstall Ruby, then re-install Watir
on top of the new Ruby
and that would be my advice too.