Getting Exception NoClassDefFoundError: com/eviware/soapui/config/InvalidSecurityScanConfig

I am trying to execute test case through eclipse but I am getting execption : NoClassDefFoundError: com/eviware/soapui/config/InvalidSecurityScanConfig. 

Below is my code :

//Access our SOAP project
WsdlProject project = new WsdlProject("D:\\SOAP Training\\PROJECTS\\FRMWRK_Employee.xml");

//Access Test Suite to execute
WsdlTestSuite testSuite = project.getTestSuiteByName("Testing");

//Access test cases present in the test suite
for (int i = 0; i < testSuite.getTestCaseCount(); i++) {
    //Access test case
    WsdlTestCase testCase = testSuite.getTestCaseAt(i);

    //Run the test case
    TestRunner runner = testCase.run(new PropertiesMap(), false);
    Assert.assertEquals(TestRunner.Status.FINISHED, runner.getStatus());

}

and below is the exception:

Exception in thread "main" java.lang.NoClassDefFoundError: com/eviware/soapui/config/InvalidSecurityScanConfig

at testPackage.SoapUITest.main(SoapUITest.java:17)

Caused by: java.lang.ClassNotFoundException: com.eviware.soapui.config.InvalidSecurityScanConfig

at java.net.URLClassLoader.findClass(URLClassLoader.java:381)

at java.lang.ClassLoader.loadClass(ClassLoader.java:424)

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)

at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

Please help me to get it resolved.