Not working with yahoo

[pramodshinde]

c = Contacts.new(:yahoo, '***', '**')
undefined method index' for nil:NilClass from /home/pramod/.rvm/gems/ruby-1.9.3-p374/gems/contacts-1.2.4/lib/contacts/yahoo.rb:17:inreal_connect'
from /home/pramod/.rvm/gems/ruby-1.9.3-p374/gems/contacts-1.2.4/lib/contacts/base.rb:26:in connect' from /home/pramod/.rvm/gems/ruby-1.9.3-p374/gems/contacts-1.2.4/lib/contacts/base.rb:21:ininitialize'
from /home/pramod/.rvm/gems/ruby-1.9.3-p374/gems/contacts-1.2.4/lib/contacts/base.rb:202:in new' from /home/pramod/.rvm/gems/ruby-1.9.3-p374/gems/contacts-1.2.4/lib/contacts/base.rb:202:innew'
from (irb):1
from /home/pramod/.rvm/gems/ruby-1.9.3-p374/gems/railties-3.2.11/lib/rails/commands/console.rb:47:in start' from /home/pramod/.rvm/gems/ruby-1.9.3-p374/gems/railties-3.2.11/lib/rails/commands/console.rb:8:instart'
from /home/pramod/.rvm/gems/ruby-1.9.3-p374/gems/railties-3.2.11/lib/rails/commands.rb:41:in <top (required)>' from script/rails:6:inrequire'
from script/rails:6:in `

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