ruby on rails - How to freeze a gem that doesn't want to freeze? (rack) -

I get this error when I try to run my rail app for my shared hosting :

  can not activate rack (~> 1.0.1, runtime) for [], already active rack -0.0.0 []  < / Pre> 
 So I want to freeze the rack gem in my Dev environment, and add it to the project, but even if it is in my config / environment.rb: 
 
  Config.gem 'rack'   
  ajmbp: trunk ajl $ rake gems: unpack: dependence (/ users / ajl / dev / site / trunk) ajmbp: trunk ajl $ ll vendor / gemma / .svn / haml-2.2 14 / net-ssh-2.0.16 /  
 
 I tried to add another gem to configure. Just for fun (redcloth) is a test and he does the required work, but there is no luck with the rack. 
 
 Any thoughts? Thanks! 
 

Are you trying to upgrade to Rail 2.3.5? Read this thread:

Short answer: You can not do but Dreamhost will upgrade the train on Monday.