Maven SoapUI Problem

Hi,

I'm trying to integrate SoapUI with maven using soapui-maven-plugin, but I have the following problem:

10:55:04,723 ERROR [AbstractTestRunner] Exception during Test Execution
java.lang.NoClassDefFoundError: org/apache/commons/httpclient/contrib/ssl/EasySS
LProtocolSocketFactory
        at com.eviware.soapui.impl.wsdl.support.http.HttpClientSupport.(
HttpClientSupport.java:47)
        at com.eviware.soapui.impl.wsdl.submit.transports.http.HttpClientRequest
Transport.sendRequest(HttpClientRequestTransport.java:89)
        at com.eviware.soapui.impl.wsdl.WsdlSubmit.run(WsdlSubmit.java:122)
        at com.eviware.soapui.impl.wsdl.WsdlSubmit.submitRequest(WsdlSubmit.java
:75)
        at com.eviware.soapui.impl.support.http.HttpRequest.submit(HttpRequest.j
ava:258)
        at com.eviware.soapui.impl.wsdl.teststeps.HttpTestRequestStep.run(HttpTestRequestStep.java:253)
        at com.eviware.soapui.impl.wsdl.testcase.WsdlTestCaseRunner.runTestStep(WsdlTestCaseRunner.java:193)
        at com.eviware.soapui.impl.wsdl.testcase.WsdlTestCaseRunner.internalRun(WsdlTestCaseRunner.java:124)
        at com.eviware.soapui.impl.wsdl.testcase.WsdlTestCaseRunner.internalRun(WsdlTestCaseRunner.java:39)
        at com.eviware.soapui.impl.wsdl.support.AbstractTestRunner.run(AbstractTestRunner.java:137)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:417)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:269)
        at java.util.concurrent.FutureTask.run(FutureTask.java:123)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
        at java.lang.Thread.run(Thread.java:595)
10:55:04,770 INFO  [SoapUITestCaseRunner] Finished running soapUI testcase [CorrectResponse], time taken: 0ms, status: FAILED
10:55:04,770 INFO  [SoapUITestCaseRunner] Project [ic-sts-testing-support] finished with status [FAILED] in 94ms
[ERROR] java.lang.Exception: TestCase [CorrectResponse] failed without assertions

I'm testing only an xml request over http (without WSDL), when I used the graphic tool works properly, but when I want to run with maven I have this error.

Do you have some ideas, thanks in advance.

Best Regards

Susana