Google-geocode gem giving an error

Hi, I doing an integration my rails application with google map. For that I have installed the "google-geocode (1.2.1)" gem. I have written following code to get the longitude and latitude of the address. require 'rubygems'   require 'google_geocode'   def index     gg = "#{Api_Key}"    loc = gg.locate('Pune')    puts loc.inspect   end Whenever I running this code I getting following error "TypeError: can't convert String into Integer   from /usr/local/ruby/lib/ruby/gems/1.8/gems/google-geocode-1.2.1/lib/google_geoc ode.rb:72:in `'   from /usr/local/ruby/lib/ruby/gems/1.8/gems/google-geocode-1.2.1/lib/google_geoc ode.rb:72:in `check_error'   from /usr/local/ruby/lib/ruby/gems/1.8/gems/rc-rest-4.0/lib/rc_rest.rb:128:in `get'   from /usr/local/ruby/lib/ruby/gems/1.8/gems/google-geocode-1.2.1/lib/google_geoc ode.rb:51:in `locate'   from (irb):7" Can anyone tell me what is the wrong with my code? Thanks, Tushar