有人在JWebunit集成测试里面使用过dbunit吗？？？

我的测试代码如下（一部分）
public class UserTest extends WebTestCase   
{
    private File file;
    private IDatabaseConnection connection;
    private IDataSet dataSet;

    public UserTest()
    {
        super();
        getTestContext().setBaseUrl("http://localhost:8080/PMV4");
        setUserAgent("GUANGYU_PMV4_RCP");
    }
    protected void setUserAgent(final String userAgent)
    {
        tester.getTestContext().setUserAgent(userAgent);
    }
    protected void setUp() throws Exception
    {
        super.setUp();
        // initialize database connection here
        Class driverClass = Class.forName("org.hsqldb.jdbcDriver");
        Connection jdbcConnection = DriverManager.getConnection(
                "jdbc:hsqldb:hsql://localhost/PMV4", "sa", "");
        connection
            = new DatabaseConnection(jdbcConnection);
        dataSet = connection.createDataSet();
        file = new File("full.xml");
        FlatXmlDataSet.write(dataSet, new FileWriter(file), "GBK");
        DatabaseOperation.CLEAN_INSERT.execute(connection, dataSet);
    }
   protected void tearDown() throws DatabaseUnitException, SQLException
    {
        connection.close();
        connection = null;
        file.delete();
    }
}
因为我的数据库里面有两个表，一个是TBLDEPARTMENT和TBLUSER。这个测试是只针对USER表里面的数据进行操作的。但是每次都会报下面的错误。
java.sql.SQLException: Integrity constraint violation FK7F3BC9B09D1E094E table: TBLDEPARTMENT
    at org.hsqldb.jdbc.jdbcUtil.sqlException(Unknown Source)
    at org.hsqldb.jdbc.jdbcStatement.fetchResult(Unknown Source)
    at org.hsqldb.jdbc.jdbcStatement.execute(Unknown Source)
    at org.dbunit.database.statement.SimpleStatement.executeBatch(SimpleStatement.java:54)
    at org.dbunit.operation.DeleteAllOperation.execute(DeleteAllOperation.java:112)
    at com.guangyu.pmv4.webapp.view.UserCSTest.setUp(UserCSTest.java:52)
    at junit.framework.TestCase.runBare(TestCase.java:125)
    at junit.framework.TestResult$1.protect(TestResult.java:106)
    at junit.framework.TestResult.runProtected(TestResult.java:124)
    at junit.framework.TestResult.run(TestResult.java:109)
    at junit.framework.TestCase.run(TestCase.java:118)
    at junit.framework.TestSuite.runTest(TestSuite.java:208)
    at junit.framework.TestSuite.run(TestSuite.java:203)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:478)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:344)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)

本人对数据库不太在行，有人知道是哪里的问题吗？
如果我把CLEAN_INSERT换成别的，如REFRESH就不会 有这种错，到底是哪里的问题啊？