Quote Originally Posted by skhanal View Post
Is there a firewall between client and server?. Can you telnet to Oracle port (1521)

telnet server 1521

If you can connect that means firewall is open.
You advice is unhelpful since it is a local database running on a laptop. The original poster is likely accessing the database directly from the laptop. It is a question of getting the environment variables right and making sure the service is running and setup correctly.