having problem with file_column plug in

I have downloaded file_column plug in . When i implemented it ,i can
upload image successfully ! but when i trying to display it gives only
image name , and gives wrong path

Wrong path !
no route found to match "/user/image/development/39/virago.jpg" with
{:method=>:get}

Correct Path!
instead of "/user/image/39/virago.jpg" this .

I can not understand why this development folder is there in wronh path
! there is no physically development foldre there ! but when i made
development folder it Run ! strange !

help me !