Echo Speaks Error on Authentication

I am working through the process of getting Echo Speaks working, i get to the point where i am trying authenticate to Amazon from the app servers on heroku.

When i go to authenticate I get to the point where i get an SMS with the six digit code, The page is refreshing so fast i have to copy and paste but when i submit the code i get this error

Cannot POST /ap/cvf/approval/verifyOtp

i have deleted and reinstalled everything and still get the same errors.

Thanks in advance..