watir install report failed to build gem native extension

I've installed a instantrail2.0. I want to install watir 1.65

First I installed watir-1.6.5.gem it said 302 fetching http://gems.r....

then I downlord a rubygems-update-1.3.7.gem and type

gem install --local rubygems-update-1.3.7.gem

successfully installed. then I type in update_rubygems

next I type in gem install watir-1.6.5.gem but it appears ERROR:Failed to build gem native extension

I searched and found an answer that开发者_JAVA技巧 1.3.7 doesn't support win32. then I type

gem install sqlite3-ruby -v 1.3.0  gem install watir-1.6.5.gem
ERROR:Failed to build gem native extension

gem install sqlite3-ruby -v 1.2.3  gem install watir-1.6.5.gem
ERROR:Failed to build gem native extension

How can I do next??

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use a more current version of Watir

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I second Zeljko, going with the latest versions of rubygems and watir totally makes sense. If you must stick to older gems, try installing Ruby DevKit and then do the gem install to see if that helps.

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What version of Ruby are you using? You should be using Ruby 1.8.6 with that version of Watir. I am also wondering if part of your problem is that you are doing a local install, instead of installing from internet. Local installs of Watir are difficult because of all of its dependencies.