java.lang.NoClassDefFoundError: TestSuite

Hi All,
when i run  Junit in soapui using groovy script i am getting the following error.
(in groovy i am using the statement : junit.textui.TestRunner.run(CommonDataCreation.suite()))

java.lang.NoClassDefFoundError: TestSuite
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
at java.net.URLClassLoader.access$000(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
at groovy.lang.GroovyClassLoader.loadClass(GroovyClassLoader.java:660)
at groovy.lang.GroovyClassLoader.loadClass(GroovyClassLoader.java:759)
at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
at groovy.lang.GroovyClassLoader.loadClass(GroovyClassLoader.java:660)
at groovy.lang.GroovyClassLoader.loadClass(GroovyClassLoader.java:527)
at org.codehaus.groovy.control.ResolveVisitor.resolveToClass(ResolveVisitor.java:618)
at org.codehaus.groovy.control.ResolveVisitor.resolve(ResolveVisitor.java:264)
at org.codehaus.groovy.control.ResolveVisitor.visitClass(ResolveVisitor.java:988)
at org.codehaus.groovy.control.ResolveVisitor.startResolving(ResolveVisitor.java:141)
at org.codehaus.groovy.control.CompilationUnit$5.call(CompilationUnit.java:553)
at org.codehaus.groovy.control.CompilationUnit.applyToSourceUnits(CompilationUnit.java:798)
at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:464)
at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:278)
at groovy.lang.GroovyShell.parseClass(GroovyShell.java:590)
at groovy.lang.GroovyShell.parse(GroovyShell.java:602)
at groovy.lang.GroovyShell.parse(GroovyShell.java:582)
at groovy.lang.GroovyShell.parse(GroovyShell.java:621)
at com.eviware.soapui.support.scripting.groovy.SoapUIGroovyScriptEngine.compile(SoapUIGroovyScriptEngine.java:85)
at com.eviware.soapui.support.scripting.groovy.SoapUIGroovyScriptEngine.run(SoapUIGroovyScriptEngine.java:56)
at com.eviware.soapui.impl.wsdl.teststeps.WsdlGroovyScriptTestStep.run(WsdlGroovyScriptTestStep.java:148)
at com.eviware.soapui.impl.wsdl.panels.teststeps.GroovyScriptStepDesktopPanel$RunAction$1.run(GroovyScriptStepDesktopPanel.java:273)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)


Can any one please help me. it is urgent .
i am working with SOAPUI 3.0.1.