I'm trying to get tags working in my rails application and want to use acts\_as\_taggable. Firstly I followed the instructions I found in Rails Recipies (a free sample bit online) that used the acts\_as\_taggable plugin. However, I then found [this site](http://taggable.rubyforge.org/) which seems to have a gem for acts\_as\_taggable which is more advanced (has options for related tags etc).

I've tried to follow the instructions there to install it, but I keep getting errors.

Firstly I installed the gem as normal (`gem install acts_as_taggable`) and then I tried various ways to get rails to recognise and load the gem. The `require_gem` listed on the site didn't work (I assume that is an old command that has been removed) and neither did a straight `require` (although that has worked for my bluecloth gem).

I've then tried using `config.gem 'acts_as_taggable'` but that keeps telling me that I haven't got acts\_as\_taggable installed and asks me to run `rake gems:install`. No matter how many times I run that it still gives the error!

The result of the `gem query -l -n acts_as_taggable` lists acts\_as\_taggable as an installed local gem.

I've tried running `gem check` and that doesn't show any problems.

The response I get when I try to require it from the console is:

```
MissingSourceFile: no such file to load -- acts_as_taggable
        from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `ge
m_original_require'
        from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `re
quire'
        from c:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_suppo
rt/dependencies.rb:510:in `require'
        from c:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_suppo
rt/dependencies.rb:355:in `new_constants_in'
        from c:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_suppo
rt/dependencies.rb:510:in `require'
        from (irb):1

```

It looks like for some reason it can't find it. Any ideas why?