Error during database connection to the database

Hi

I am doing Rfc To Jdbc Scenario

While running the scenario i am getting the following error

Error during database connection to the database URL 'jdbc:oracle:thin@168.89.118.23:1521:WH0' using the JDBC driver 'oracle.jdbc.driver.OracleDriver': 'com.sap.aii.adapter.jdbc.sql.DriverManagerException: Cannot establish connection to URL 'jdbc:oracle:thin@168.89.118.23:1521:WH0': SAPClassNotFoundException: oracle.jdbc.driver.OracleDriver'

Can any body give suggestions

Regards

sunilreddy