google reader authentication

I had developed iphone application which synchronize google reader on iphone. when i login with my google id the status code 200 & after tha开发者_C百科t when token for accessing google reader status code is 403 & token value gives 403 error url for token used "https://www.google.com/reader/api/0/token" i am searching it almost a week please help me out but can't get anything i can send you the code thanx in advance

---

See Google Reader Authentication problem.

---

See my example in C#. The requests will be the same, but if you are using Obj-C you will just need to modify the syntax.

Google Reader API - Getting Feeds