org.eclipse.birt.data.engine.odaconsumer.OdaDataException: Cannot execute the statement.
    org.eclipse.datatools.connectivity.oda.OdaException ;
    java.lang.reflect.InvocationTargetException
    at org.eclipse.birt.data.engine.odaconsumer.ExceptionHandler.newException(ExceptionHandler.java:52)
    at org.eclipse.birt.data.engine.odaconsumer.ExceptionHandler.throwException(ExceptionHandler.java:108)
    at org.eclipse.birt.data.engine.odaconsumer.ExceptionHandler.throwException(ExceptionHandler.java:84)
    at org.eclipse.birt.data.engine.odaconsumer.PreparedStatement.execute(PreparedStatement.java:586)
    at org.eclipse.birt.data.engine.executor.DataSourceQuery.execute(DataSourceQuery.java:980)
    at org.eclipse.birt.data.engine.impl.PreparedOdaDSQuery$OdaDSQueryExecutor.executeOdiQuery(PreparedOdaDSQuery.java:607)
    at org.eclipse.birt.data.engine.impl.QueryExecutor.execute(QueryExecutor.java:1251)
    at org.eclipse.birt.data.engine.impl.ServiceForQueryResults.executeQuery(ServiceForQueryResults.java:233)
    at org.eclipse.birt.data.engine.impl.QueryResults.getResultIterator(QueryResults.java:178)
    at org.eclipse.birt.report.engine.api.impl.ExtractionResults.nextResultIterator(ExtractionResults.java:157)
    at org.eclipse.birt.report.designer.data.ui.dataset.DataSetPreviewer.preview(DataSetPreviewer.java:69)
    at org.eclipse.birt.report.designer.data.ui.dataset.ResultSetPreviewPage$5.run(ResultSetPreviewPage.java:372)
    at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:119)
Caused by: org.eclipse.datatools.connectivity.oda.OdaException ;
    java.lang.reflect.InvocationTargetException
    at org.eclipse.birt.data.oda.pojo.impl.internal.PojoDataSetFromCustomClass.open(PojoDataSetFromCustomClass.java:194)
    at org.eclipse.birt.data.oda.pojo.impl.Query.executeQuery(Query.java:131)
    at org.eclipse.datatools.connectivity.oda.consumer.helper.OdaQuery.doExecuteQuery(OdaQuery.java:480)
    at org.eclipse.datatools.connectivity.oda.consumer.helper.OdaQuery.executeQuery(OdaQuery.java:444)
    at org.eclipse.birt.data.engine.odaconsumer.PreparedStatement.execute(PreparedStatement.java:575)
    ... 9 more
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.eclipse.birt.data.oda.pojo.impl.internal.PojoDataSetFromCustomClass.open(PojoDataSetFromCustomClass.java:180)
    ... 13 more
Caused by: java.lang.ClassNotFoundException: org.firebirdsql.jdbc.FBDriver
    at org.eclipse.birt.core.framework.URLClassLoader.findClass1(URLClassLoader.java:188)
    at org.eclipse.birt.core.framework.URLClassLoader$1.run(URLClassLoader.java:156)
    at org.eclipse.birt.core.framework.URLClassLoader$1.run(URLClassLoader.java:1)
    at java.security.AccessController.doPrivileged(Native Method)
    at org.eclipse.birt.core.framework.URLClassLoader.findClass(URLClassLoader.java:151)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Unknown Source)
    at com.mikadoas.birt.ReportDataSource.getJDBC(ReportDataSource.java:27)
    at com.mikadoas.birt.DSDailyCC.open(DSDailyCC.java:26)
    at com.mikadoas.birt.ReportDataSource.open(ReportDataSource.java:96)
    ... 18 more