Abhilash,
Just wanted to inform you that I'm able to connect now and this is what I did.
- I first tried to connect to the server with the server name and the port number 11644 assigned to default instance.
- I changed the port of the default instance to 1433. SQL Server always listen to the port 1433 as default port.
- I tried to connect to server and it connected successfully.
Also, wanted to thank Brian Dong and Ludek Uher for adding to the discussion.
Best regards