Uninitialized constant LangHelper::GetText (NameError)

Hi,
im have install this gem, then why am i getting this error.
pls help.

$ gem install gettext
Successfully installed gettext-2.0.4
1 gem installed
Installing ri documentation for gettext-2.0.4…
Installing RDoc documentation for gettext-2.0.4…

$ mongrel_rails start
** Starting Mongrel listening at 0.0.0.0:3000
** Starting Rails with development environment…
C:/Documents and
Settings/srikanth/projects/livetagz/vendor/rails/activesupport/
lib/active_support/dependencies.rb:440:in load_missing_constant': uninitialized constant LangHelper::GetText (NameError) from C:/Documents and Settings/srikanth/projects/livetagz/vendor/rails/a ctivesupport/lib/active_support/dependencies.rb:80:inconst_missing’
from C:/Documents and
Settings/srikanth/projects/livetagz/vendor/plugins
/lang_helper/lib/lang_helper.rb:8
from
d:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in ge m_original_require' from d:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:inre
quire’
from C:/Documents and
Settings/srikanth/projects/livetagz/vendor/rails/a
ctivesupport/lib/active_support/dependencies.rb:156:in require' from C:/Documents and Settings/srikanth/projects/livetagz/vendor/rails/a ctivesupport/lib/active_support/dependencies.rb:521:innew_constants_in’
from C:/Documents and
Settings/srikanth/projects/livetagz/vendor/rails/a
ctivesupport/lib/active_support/dependencies.rb:156:in require' from C:/Documents and Settings/srikanth/projects/livetagz/vendor/plugins /lang_helper/init.rb:7:inevaluate_init_rb’
… 23 levels…
from
d:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/…/
lib/mongrel/command.rb:212:in run' from d:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/mon grel_rails:281 from d:/ruby/bin/mongrel_rails:19:inload’
from d:/ruby/bin/mongrel_rails:19

Thanks,
Srikanth