Twitter API integration problem in iphone

I am integrating this API in twitter.

http://mobile.tutsplus.com/tutorials/iphone开发者_高级运维/twitter-api-iphone/

but when I am running it with my application I am seeing an message

" TWoah there!

This page is no longer valid. It looks like someone already used the token information you provided. Please return to the site that sent you to this page and try again ... it was probably an honest mistake ".

I have given right kOAuthConsumerKey and kOAuthConsumerSecret. What is wrong with the code ?

Thanks in advance.

You have to get new ConsumerSecret and ConsumerKey, the given keys in tutorial will not work. Sign in here and obtain keys for use.