Middleman not running

#1

I can’t get middleman to run my project anymore. It throws the following message…

C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/bundler-1.7.7/lib/bundler/r
untime.rb:34:in block in setup': You have already activated padrino-support 0.1 3.2, but your Gemfile requires padrino-support 0.12.6. Prepending bundle exec`
to your command may solve this. (Gem::LoadError)

#2

Have you tried starting middleman like this?:

bundle exec middleman