为什么Vray安装不成功，提示没有文件RubyWinFunc.so？

Error: #<LoadError: cannot load such file -- RubyWinFunc.so>
C:/Program Files (x86)/SketchUp/SketchUp 2014/Tools/RubyStdLib/rubygems/core_ext/kernel_require.rb:45:in `require'
C:/Program Files (x86)/SketchUp/SketchUp 2014/Tools/RubyStdLib/rubygems/core_ext/kernel_require.rb:45:in `require'
C:/Users/Administrator/AppData/Roaming/SketchUp/SketchUp 2014/SketchUp/Plugins/vfs.rb:22:in `getWindowsASGVISFolder'
C:/Users/Administrator/AppData/Roaming/SketchUp/SketchUp 2014/SketchUp/Plugins/vfs.rb:42:in `getASGVISRubyFolder'
C:/Users/Administrator/AppData/Roaming/SketchUp/SketchUp 2014/SketchUp/Plugins/vfs.rb:51:in `<top (required)>'