启动redmine 1.2失败

当我试图用与redmine本身绑定的服务器启动redmine 1.2时，它显示了gem的错误，信息如下：

[root@XPG redmine-1.2.0]# ruby script/server webtrick -e production
Missing the i18n 0.4.2 gem. Please `gem install -v=0.4.2 i18n`

即使我已经安装了宝石，它说：

[root@XPG redmine-1.2.0]# gem list --local
*** LOCAL GEMS ***
aasm (2.2.0)
abstract (1.0.0)
actionmailer (2.3.5)
actionpack (2.3.5)
activerecord (2.3.5)
activeresource (2.3.5)
activesupport (2.3.5)
arel (2.0.10)
Ascii85 (1.0.1)
block_helpers (0.3.3)
builder (2.1.2)
bundler (1.0.14)
capybara (1.0.0)
childprocess (0.1.9)
cucumber (1.0.0)
cucumber-rails (1.0.2)
diff-lcs (1.1.2)
edavis10-object_daddy (0.4.3)
erubis (2.6.6)
ffi (1.0.9)
gherkin (2.4.1)
holidays (1.0.2)
i18n (0.4.2)
icalendar (1.1.6)
json (1.6.1, 1.5.3)
json_pure (1.5.3)
mail (2.2.19)
mime-types (1.16)
mocha (0.9.12)
mysql (2.8.1)
nokogiri (1.5.0)
pdf-reader (0.9.2)
polyglot (0.3.1)
prawn (0.11.1)
rack (1.2.3, 1.1.2, 1.0.1)
rack-mount (0.6.14)
rack-test (0.5.7)
rails (2.3.5)
rake (0.9.0)
rubygems-update (1.8.11, 1.8.4, 1.5.3, 1.3.7)
rubyzip (0.9.4)
selenium-webdriver (0.2.2)
shoulda (2.10.3)
sqlite3 (1.3.3)
sqlite3-ruby (1.3.3)
term-ansicolor (1.0.5)
thor (0.14.6)
treetop (1.4.9)
ttfunk (1.0.1)
tzinfo (0.3.27)
xpath (0.1.4)

但问题仍然存在，有什么办法解决吗？