Rails - May 2009 - act_as_state_machine (or aasm) to manage integer state?

I have already done my model and i have managed state with an external
table where with paperclip i appended an icon for every state.

But now i have some trouble with aasm, it seems it can''t use integer
value as state, does anyone have had some similar case?

  aasm_column :state_id
  aasm_initial_state :"1" #To print

  aasm_state :"1" #To print
  aasm_state :"2" #Waiting
  aasm_state :"3" #Selected

i''ve also tried to use something like this but naturally when i attempt
to use transaction to change state i get an error

  aasm_column :state_id
  aasm_initial_state :"1" #To print

  aasm_state :"1" #To print
  aasm_state :"2" #Waiting
  aasm_state :"3" #Selected

when i attempt to use transaction to change state i get this error:
You have a nil object when you didn''t expect it!
The error occurred while evaluating nil.name

D:/Marco/Progetti/Ruby/Rails232/Sviluppo/eMissive/vendor/plugins/rubyist-aasm-baceb4b53e296cd45ac3acbd5df291e14b2993aa/lib/state.rb:14:in
`==''
D:/Marco/Progetti/Ruby/Rails232/Sviluppo/eMissive/vendor/plugins/rubyist-aasm-baceb4b53e296cd45ac3acbd5df291e14b2993aa/lib/aasm.rb:123:in
`aasm_state_object_for_state''
C:/ruby/lib/ruby/gems/1.8/gems/ruby-debug-ide-0.3.1/lib/ruby-debug/command.rb:119:in
`find''
D:/Marco/Progetti/Ruby/Rails232/Sviluppo/eMissive/vendor/plugins/rubyist-aasm-baceb4b53e296cd45ac3acbd5df291e14b2993aa/lib/aasm.rb:123:in
`each''
D:/Marco/Progetti/Ruby/Rails232/Sviluppo/eMissive/vendor/plugins/rubyist-aasm-baceb4b53e296cd45ac3acbd5df291e14b2993aa/lib/aasm.rb:123:in
`find''
D:/Marco/Progetti/Ruby/Rails232/Sviluppo/eMissive/vendor/plugins/rubyist-aasm-baceb4b53e296cd45ac3acbd5df291e14b2993aa/lib/aasm.rb:123:in
`aasm_state_object_for_state''
D:/Marco/Progetti/Ruby/Rails232/Sviluppo/eMissive/vendor/plugins/rubyist-aasm-baceb4b53e296cd45ac3acbd5df291e14b2993aa/lib/aasm.rb:129:in
`aasm_fire_event''
D:/Marco/Progetti/Ruby/Rails232/Sviluppo/eMissive/vendor/plugins/rubyist-aasm-baceb4b53e296cd45ac3acbd5df291e14b2993aa/lib/aasm.rb:62:in
`review!''
D:/Marco/Progetti/Ruby/Rails232/Sviluppo/eMissive/app/controllers/admin/letters_controller.rb:195:in
`print''
D:/Marco/Progetti/Ruby/Rails232/Sviluppo/eMissive/app/controllers/admin/letters_controller.rb:176:in
`print''
-- 
Posted via http://www.ruby-forum.com/.

Doesn''t anyone know how to do or if exist a fork which is able to do 
this? It''s a pity to don''t use this helpful plugin and was
perfect for
my purpose
-- 
Posted via http://www.ruby-forum.com/.