Error creating JDBC connection in Eclipse

Hello.

I have problem with creating jdbc connection in Eclipse 3.1. This connection I want to use in J2EE application.

message:
Error creating JDBC Connection connection to xxx@oracle. (Error: Bad version number in .class file)

exception:

java.lang.UnsupportedClassVersionError: Bad version number in .class file
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknow n Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.net.FactoryURLClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at org.eclipse.datatools.connectivity.drivers.jdbc.JD BCConnection.createConnection(JDBCConnection.java: 205)
at org.eclipse.datatools.connectivity.DriverConnectio nBase.internalCreateConnection(DriverConnectionBas e.java:104)
at org.eclipse.datatools.connectivity.DriverConnectio nBase.open(DriverConnectionBase.java:53)
at org.eclipse.datatools.connectivity.drivers.jdbc.JD BCConnection.open(JDBCConnection.java:72)
at org.eclipse.datatools.enablement.internal.oracle.J DBCOracleConnectionFactory.createConnection(JDBCOr acleConnectionFactory.java:27)
at org.eclipse.datatools.connectivity.internal.Connec tionFactoryProvider.createConnection(ConnectionFac toryProvider.java:83)
at org.eclipse.datatools.connectivity.internal.Connec tionProfile.createConnection(ConnectionProfile.jav a:355)
at org.eclipse.datatools.connectivity.internal.Manage dConnection.createConnection(ManagedConnection.jav a:166)
at org.eclipse.datatools.connectivity.internal.Create ConnectionJob.run(CreateConnectionJob.java:56)
at org.eclipse.core.internal.jobs.Worker.run(Worker.j ava:55)

Does anyone help me with it?

Thanks.

Check that
1.) Your database driver is compatible with the Java version you are using.
2.) You are running the program with a java version compatible with the compiler version that generated the .class files

Thanks a lot. The problem is I used for connect ojdbc6.jar. I try a ojdbc5.jar and it is OK. Thanks a lot once more.