juggernaut and flash_plugin

Hi

I am trying to use juggernaut plugin. I have a problem when I add this line
       <%= flash_plugin(session[:juggernaut_channels]) %>
I have an error
  undefined method `flash_plugin' for #<#<Class:0x31e66f0>:0x31e66c8>

But I don't see any flash_plugin helper

Any idea?

Thanks