Hi All,
I'm trying to use Mule Task but when I upload the process definition I get an error message "Could not find org.activiti.mule.MuleSendActivitiBehavior" 
My Mule task 
<serviceTask id="servicetask1" name="Service Task" activiti:type="mule">
       <extensionElements>
        <activiti:field name="endpointUrl">
          <activiti:string>vm://in</activiti:string>
        </activiti:field>
        <activiti:field name="language">
          <activiti:string>juel</activiti:string>
        </activiti:field>
        <activiti:field name="payloadExpression">
          <activiti:string>"hi"</activiti:string>
        </activiti:field>
        <activiti:field name="resultVariable">
          <activiti:string>theVariable</activiti:string>
        </activiti:field>
      </extensionElements> 
    </serviceTask>
Best Regards,