Connecting to Twitter

IN my application i want to connect to the twitter , i can able to connect to the twitter in example given in net . BUt When i use the same code in my application i cant able to connect to the twitter , I am getting this error .
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[OAMutableURLRequest initWithURL:consumer:token:realm:signatureProvider:]: unrecognized selector sent to instance '


Please help me, it is urgent for me. I have to complete this soon

I have found one tutorial which will guide you to connect to the twitter in your application. It's link is as below:

mobile.tutsplus.com/tutorials/iphone/twitter-api-iphone/

i tried the tutorial at your given link.It goes fine at point of authorization. But after authorization it do not return back to application.

Hi,
I got a good iphone programming tutotrial site which will help you to integrating twitter into your iphone application. You can go through this site -
icodeblog.com/2009/07/09/integrating-twitter-into-your-applications/

Thanks