SSPI Error can any solve this error !!!

Hi,

Following link I have used to create an Service in Ax and then running in Visual Studio 2010. I have followed all the steps mentioned in the below link.

http://daxdilip.blogspot.com/2011/10/how-to-consume-dynamics-ax-2012.html

On clicking on button in Vs 2010, I am getting error as “A call to SSPI failed, see inner exception”. This is an error for configuration but I am not able to understand where I am going wrong. I have done exactly same as the above mentiond link code has.

Pls can any one help me to solve this error. If you need i can send you the code written by me. and also the config file code. If required pls let me know. Thanks in advance. Pls help me

Himanshu.