I just installed oracle webligic 12.1.1, and I follow this videos's instructions:
[youtube video](http://www.youtube.com/watch?v=ER5Digq4Woc)

I write everything the same as in the video, when I wanted to test it, I got this exception:

```
Connection test failed.
IO exception: The Network Adapter could not establish the connection<br/>oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:458)
    oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:546)
    oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:236)
    oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
    oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:521)
    weblogic.jdbc.common.internal.DataSourceUtil.testConnection(DataSourceUtil.java:298)
    com.bea.console.utils.jdbc.JDBCUtils.testConnection(JDBCUtils.java:746)
    com.bea.console.actions.jdbc.datasources.createjdbcdatasource.CreateJDBCDataSource.testConnectionConfiguration(CreateJDBCDataSource.java:474)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    java.lang.reflect.Method.invoke(Method.java:597)
    org.apache.beehive.netui.pageflow.FlowController.invokeActionMethod(FlowController.java:870)
    org.apache.beehive.netui.pageflow.FlowController.getActionMethodForward(FlowController.java:809)
    org.apache.beehive.netui.pageflow.FlowController.internalExecute(FlowController.java:478)
    org.apache.beehive.netui.pageflow.PageFlowController.internalExecute(PageFlowController.java:306)
    org.apache.beehive.netui.pageflow.FlowController.execute(FlowController.java:336)
    org.apache.beehive.netui.pageflow.internal.FlowControllerAction.execute(FlowControllerAction.java:52)
    org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
    org.apache.beehive.netui.pageflow.PageFlowRequestProcessor.access$201(PageFlowRequestProcessor.java:97)
...

```

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What could be the error, how could I solve it? Please, help me! Thank you!