Android : Internal server Error Using http UrlConnection

1. 
   

   I am referred this link(Upload large file in Android without outofmemory error) for send internal storage file to server After that i got error internal server means 500 in my previous app working perfectly .this problem is client side or my server side

   
   

   I am using file directory File mydir = context.getDir("mydir", Context.MODE_PRIVATE);