Ruby_http_parser.rb error

Hello all,

When I try to start Middleman, I have this error …
C:/Ruby200/lib/ruby/gems/2.0.0/gems/http_parser.rb-0.5.3-x86-mingw32/lib/ruby_ht
tp_parser.rb:2:in `require’: cannot load such file – 2.0/ruby_http_parser (Load
Error)

I have tried to install the latest http_parser.rb (version 0.6.0) gem but I still have the same problem.

Anyone?

Thanks!

Jacques