JDBC Adapter Connection

HI, While Connecting to the Oracle Database, i am getting the below Error!!.. I do not understand what kind of error it is:
Error encountered
[ART.118.5042] Adapter Runtime (Connection): Unable to enable connection resource Tutorial.JDBC:Ex0218.[ART.118.5036] Adapter Runtime (Connection): Unable to configure connection manager.[ADA.1.200] The JDBC DataSource class “oracle.jdbc.pool.OracleDataSource” cannot be located.oracle.jdbc.pool.OracleDataSource.class not foundI need help in solving this issue and connecting to the Database.Thanks.

do you import the class12.zip for oralce?
and if you run the IS in unix, you should change it to executed properites: chmod 755

Place the Classes12.zip in your webm_home\IntegrationServer\lib\jars folder and then restart the IS.