run on test case level throws exception

I have a test case with 7 steps.
When I run each step separately, the execute with success.
But when I run the test case as a whole I got an exception

Mon Mar 31 17:07:23 CEST 2014:ERROR:Exception during Test Execution
java.lang.RuntimeException: listener must not be null
at com.eviware.soapui.impl.wsdl.testcase.WsdlTestCase.addTestRunListener(WsdlTestCase.java:648)
at com.eviware.soapui.impl.wsdl.panels.testsuite.ProWsdlTestSuiteDesktopPanel.beforeRun(SourceFile:134)
at com.eviware.soapui.impl.wsdl.panels.testsuite.WsdlTestSuiteDesktopPanel$InternalTestSuiteRunListener.beforeRun(WsdlTestSuiteDesktopPanel.java:492)
at com.eviware.soapui.impl.wsdl.testcase.WsdlTestSuiteRunner.notifyBeforeRun(WsdlTestSuiteRunner.java:215)
at com.eviware.soapui.impl.wsdl.testcase.WsdlTestSuiteRunner.internalRun(WsdlTestSuiteRunner.java:92)
at com.eviware.soapui.impl.wsdl.testcase.WsdlTestSuiteRunner.internalRun(WsdlTestSuiteRunner.java:42)
at com.eviware.soapui.impl.wsdl.support.AbstractTestRunner.run(AbstractTestRunner.java:135)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:744)