我安装了路边宝石：
gem install curb
但是当我通过require’curb’包含在我的ruby代码中时,它会出现以下错误
/Users/vishrutmehta/.rvm/gems/ruby-1.9.3-p448/gems/curb-0.8.5/lib/curl.rb:1:in `require'" dlopen(/Users/vishrutmehta/.rvm/gems/ruby-1.9.3-p448/gems/curb-0.8.5/lib/curb_core.bundle,9): Library not loaded: libcurl.4.dylib (LoadError) Referenced from: /Users/vishrutmehta/.rvm/gems/ruby-1.9.3-p448/gems/curb-0.8.5/lib/curb_core.bundle Reason: Incompatible library version: curb_core.bundle requires version 8.0.0 or later,but libcurl.4.dylib provides version 7.0.0 - /Users/vishrutmehta/.rvm/gems/ruby-1.9.3-p448/gems/curb-0.8.5/lib/curb_core.bundle from /Users/vishrutmehta/.rvm/gems/ruby-1.9.3-p448/gems/curb-0.8.5/lib/curl.rb:1:in `<top (required)>' from /Users/vishrutmehta/.rvm/gems/ruby-1.9.3-p448/gems/curb-0.8.5/lib/curb.rb:1:in `require' from /Users/vishrutmehta/.rvm/gems/ruby-1.9.3-p448/gems/curb-0.8.5/lib/curb.rb:1:in `<top (required)>' from /Users/vishrutmehta/.rvm/gems/ruby-1.9.3-p448@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:72:in `require' from /Users/vishrutmehta/.rvm/gems/ruby-1.9.3-p448@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:72:in `block (2 levels) in require' from /Users/vishrutmehta/.rvm/gems/ruby-1.9.3-p448@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:70:in `each' from /Users/vishrutmehta/.rvm/gems/ruby-1.9.3-p448@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:70:in `block in require' from /Users/vishrutmehta/.rvm/gems/ruby-1.9.3-p448@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:59:in `each' from /Users/vishrutmehta/.rvm/gems/ruby-1.9.3-p448@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:59:in `require' from /Users/vishrutmehta/.rvm/gems/ruby-1.9.3-p448@global/gems/bundler-1.3.5/lib/bundler.rb:132:in `require' from /Users/vishrutmehta/clapone/vishnew/config/application.rb:7:in `<top (required)>' from /Users/vishrutmehta/.rvm/gems/ruby-1.9.3-p448/gems/railties-3.2.13/lib/rails/commands.rb:53:in `require' from /Users/vishrutmehta/.rvm/gems/ruby-1.9.3-p448/gems/railties-3.2.13/lib/rails/commands.rb:53:in `block in <top (required)>' from /Users/vishrutmehta/.rvm/gems/ruby-1.9.3-p448/gems/railties-3.2.13/lib/rails/commands.rb:50:in `tap' from /Users/vishrutmehta/.rvm/gems/ruby-1.9.3-p448/gems/railties-3.2.13/lib/rails/commands.rb:50:in `<top (required)>' from script/rails:6:in `require' from script/rails:6:in `<main>'
请帮忙