enginex doesn't work with rails 3.0.10

I use command "enginex pdf_renderer", but failed, error info as follow

/home/wuguoyao/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1603:in raise_if_conflicts': can't activate activesupport-3.0.0, already activated activesupport-3.0.10 (Gem::LoadError) from /home/wuguoyao/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:738:inactivate'
from /home/wuguoyao/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:51:in block in require' from /home/wuguoyao/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:50:ineach'
from /home/wuguoyao/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:50:in require' from /home/wuguoyao/.rvm/gems/ruby-1.9.2-p0@rails3/gems/enginex-0.8.1/lib/enginex.rb:2:in<top (required)>'
from /home/wuguoyao/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:55:in require' from /home/wuguoyao/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:55:inrequire'
from /home/wuguoyao/.rvm/gems/ruby-1.9.2-p0@rails3/gems/enginex-0.8.1/bin/enginex:4:in <top (required)>' from /home/wuguoyao/.rvm/gems/ruby-1.9.2-p0@rails3/bin/enginex:19:inload'
from /home/wuguoyao/.rvm/gems/ruby-1.9.2-p0@rails3/bin/enginex:19:in `

'

[josevalim]

This is a rubygems bug. I haven't got the chance to fix it yet. You need to uninstall your older versions of activesupport and rails and just have the more recent one.

Thanks a lot.