启动服务器失败，各位朋友能帮忙看下什么问题吗

C:\Sites\work\demo>rails server
D:/Program Files/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/railties-5.0.
0.1/lib/rails/app_loader.rb:40:in `exec': No such file or directory - "D:/Progra
m Files/RailsInstaller/Ruby2.2.0/bin/ruby.exe" (Errno::ENOENT)
from D:/Program Files/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/
railties-5.0.0.1/lib/rails/app_loader.rb:40:in `block in exec_app'
from D:/Program Files/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/
railties-5.0.0.1/lib/rails/app_loader.rb:35:in `loop'
from D:/Program Files/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/
railties-5.0.0.1/lib/rails/app_loader.rb:35:in `exec_app'
from D:/Program Files/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/
railties-5.0.0.1/lib/rails/cli.rb:5:in `<top (required)>'
from D:/Program Files/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/rubygems/c
ore_ext/kernel_require.rb:69:in `require'
from D:/Program Files/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/rubygems/c
ore_ext/kernel_require.rb:69:in `require'
from D:/Program Files/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/
railties-5.0.0.1/exe/rails:9:in `<top (required)>'
from D:/Program Files/RailsInstaller/Ruby2.2.0/bin/rails:23:in `load'
from D:/Program Files/RailsInstaller/Ruby2.2.0/bin/rails:23:in `<main>'