Watirgrid-provider: `gem_original_require': no such file to load -- watir/loader (LoadError)

I am following:

This is Ok:
controller

but when I run:
provider -d watir -c druby://127.0.0.1:11235

it says the following error:
/usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:36:in
`gem_original_require': no such file to load -- watir/loader (LoadError)
  from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:36:in
`require'
  from /usr/lib/ruby/gems/1.8/gems/commonwatir-3.0.0/lib/watir.rb:1
  from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:60:in
`gem_original_require'
  from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:60:in
`require'
  from /usr/lib/ruby/gems/1.8/gems/watirgrid-1.1.5/lib/provider.rb:30:in
`initialize'
  from
/usr/lib/ruby/gems/1.8/gems/watirgrid-1.1.5/lib/provider.rb:108:in `new'
  from
/usr/lib/ruby/gems/1.8/gems/watirgrid-1.1.5/lib/provider.rb:108:in
`start'
  from /usr/lib/ruby/gems/1.8/gems/watirgrid-1.1.5/bin/provider:102
  from /usr/bin/provider:23:in `load'
  from /usr/bin/provider:23

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Can you post your gem list? Might be a version thing.

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