The remote server returned an error: (400) Bad Request on Bing batch geocode

Hi
 
I am developing a program to create job for geocode with the help of http://msdn.microsoft.com/en-us/library/ff701729 and trying to upload a file through it that was taken from http://msdn.microsoft.com/en-us/library/ff701732 but I am getting Bad Request error on:

HttpWebResponse response = (HttpWebResponse)request.GetResponse();

I have investigated for this error and got this is happening due to incorrect input file but i am using same contain as given in link. I am not able to resolve this problem while I am following all the steps as given in links.
 
Please let me know, this is very urgent.
 
Thanks,
Vikas