Hi Chandresh,
I cannot really tell what problem that you're experiencing without seeing the actual error message or screenshot.
I would suggest you to install HDB Client, and see if you can connect to your HANA instance with hdbsql command:
hdbsql \c -n <hostname> -i <inst#> -u <username> -p <password>
If you can connect with hdbsql, then try to re-install your HDB Studio.
If you cannot connect with hdbsql, then there's a problem with either the HANA instance itself or you have entered incorrect HANA connection information.
Regards,
Ferry