Unable to verify database connection

[#1]

Trying to point cloudera manager to  the database while installation.I am pastinng the error trace.Any one knows what the issue could be.I have the  oracle db driver.

Executing: /usr/java/default/bin/java -cp /usr/share/java/mysql-connector-java.jar:/usr/share/cmf/schema/../lib/* com.cloudera.enterprise.dbutil.DbCommandExecutor /etc/cloudera-scm-server/db.properties com.cloudera.cmf.db.
[ main] DbCommandExecutor INFO Able to connect to db server on host '10.7.123.21:1530' but not able to find database 'cluderamgr'.
[ main] DbCommandExecutor ERROR Error when connecting to database.
java.sql.SQLException: Listener refused the connection with the following error:
ORA-12514, TNS:listener does not currently know of service requested in connect descriptor

at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:458)[ojdbc6.jar:11.2.0.3.0]

[#2]

I am able to connect to this db using other tools like toad,db visualzer etc using the same credentials.Any thing else I need to set up.

I was able to set up this yesterday against a postgres db.