Plugin not working for me

[msplash9]

Today i was trying to make your solr search plugin work on fresh spree installation.But when i am getting an errror like this

You have requested:
spree_sunspot_search >= 0

The bundle currently has spree_sunspot_search locked at 0.10b.
Try running bundle update spree_sunspot_search
Run bundle install to install missing gems.

I will explain the sequence of action i did

git clone -b 0-70-stable git://github.com/spree/spree.git s6 [Cloned yo a folder s6]
cd s6
rails new sp6 [included the spree source code path to gem file and bundle installed]
rails g spree:site -A
rake db:bootstrap [Spree installation complete]

Included following in gemfile of sp6
gem 'spree_sunspot_search', git: 'git://github.com/jbrien/spree_sunspot_search.git'
group :test, :development do
gem 'sunspot_solr'
end

Plugin installation complete

Then i run rails generate sunspot_rails:install

After that i am getting the error

You have requested:
spree_sunspot_search >= 0

The bundle currently has spree_sunspot_search locked at 0.10b.
Try running bundle update spree_sunspot_search

Please help me .Tried running bundle update spree_sunspot_search is also .But of no use