Bundler is required to run the compression script

[Remaye]

Hi
I'm trying to figure out how to use the compress.rb scripts and I get
the following error :
"Bundler is required to run the compression script
gem install bundler"

I'm using last version of blueprint framework (joshuaclayton-blueprint-
css-9bf9513)
on Mac OSX 10.7 (ruby v1.8.7)

I'm a complete newbie on Ruby and don't even know if there is a Ruby
Install or a Blueprint issue.
Please let me know if I'm on the wrong place...

Thanks for any help.

[Guillermo Estrada]

run "gem install bundler" from a command line.