Invitation API in Linkedin is not working properly? Can somebody share me the code?

Here is the XML file i am using to send invitaion by email-id --- NSString * requestString= @"\ \ \ \ \ ABC\ XYZ\ \ \ \ Invitation to Connect\ Please join my professional network on LinkedIn.\ \ \ friend\ \ \ ";

Here is the XML file using to send invitaion by member-id --- NSString * requestString= @"\ \ \ \ \ \ \ Invitation to Connect\ Please join my professional network on LinkedIn.\ \ \ friend\ \ NAME_SEARCH\ y6Xn\ \ \ \ "; But i am getting the error- 401 1309502595763 5L213R30ZX 0 [unauthorized]. OAU:LaWgkYHS6ZfSdW8dzeBY5N2mzZTeVzxe5nNKXrfyEDGkYE8lvP00LYZAotqjRg4z|21e7b7a4-23da-4f64-b698-5049de5f8ff8|*01|*01:1309502595:3fEir09U8VFqpZgpLhySEon9dvE= Can any one know why i am getting the error? Pl开发者_开发技巧ease Help me out.....

No body will write a whole code for you.So you have to tell what you have done so far & where you are facing problem.

For reference you can refer to this post.

Also if you have any doubt using Linkedin API then you can ask your question in LinkedIn API discussion forum.