OpenPop.Net POP3 Library Delete function is not working

I am using OpenPop.Net POP3 Library to fetch emails from POP server. But when I am trying to delete a email, it doesnt work. I tried everything mentioned the documentation. Here is the sample code:

Pop3Client pop3Client = new Pop3Client();

 pop3Client.Connect('pop.gmail.com', 995, true);  pop3Client.Authenticate('*******', '*******');  int count = pop3Client.GetMessageCount();  for (int i = count; i >= 1; i--)  {   Message message = pop3Client.GetMessage(i);   pop3Client.DeleteMessage(i);

  pop3Client.Disconnect();

  break;  //deleting only one message

 }

DeleteMessage function does not work, it does not give any exception too.