I dont know if it is a problem with my iPhone code or SERVER. 

I am uploading Image/Audio from iPhone to server using NSURLConnection. The images and audio get uploaded just fine if their size is less than 60KB. 

If it is more than 60KB, I get a 400 Bad Request response from the server. 
I am not sure whats happening. I am clueless can someone help me

My webserver is IIS running on Windows 2008 R2. Web service is developed in .NET

Regards