[Rails] upload file routing error

Hi

I want to upload file using rails.

I google search find that :
http://www.tutorialspoint.com/ruby-on-rails/rails-file-uploading.htm

but it can't not work!

I also modify "<%= start_form_tag" to "<%= form_tag"
and "<%= end_form_tag %>" to "<% end %>"

It still show error message:

"Routing Error
No route matches [POST] "/upload/uploadFile" "

But on routes.rb it included get "upload/uploadFile" and get
"upload/index"

How to fix the problem ?

rails version: 3.1.1
OS : Windows XP

Thanks

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