XML : Quartz Scheduler, XML ValidationException

I'm trying to setup a Quartz Scheduler job using an XML file, the scheduler object is reading the .properties file and finds the XML job definition file. however I am getting a parsing validation exception and I can't seem to be able to find what's wrong based on the error

  11:14:12.314 [localhost-startStop-1] ERROR o.q.p.x.XMLSchedulingDataProcessorPlugin - Error scheduling jobs: Encountered 2 validation exceptions.    

org.quartz.xml.ValidationException: Encountered 2 validation exceptions.

and then

  Caused by: org.xml.sax.SAXParseException: cvc-complex-type.2.4.a: Invalid content was found starting with element 'group'. One of '{"http://www.quartz-scheduler.org/xml/JobSchedulingData":durability, "http://www.quartz-scheduler.org/xml/JobSchedulingData":job-data-map}' is expected.    

I have already defined <durability> and the job doesn't require a data map.

My XML is

  <?xml version="1.0" encoding="UTF-8"?>  <job-scheduling-data  xmlns="http://www.quartz-scheduler.org/xml/JobSchedulingData"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  xsi:schemaLocation="http://www.quartz-scheduler.org/xml/JobSchedulingData       http://www.quartz-scheduler.org/xml/job_scheduling_data_1_8.xsd"  version="1.8">        <schedule>          <job>              <name>MailJob</name>              <description>Mail dispatcher job</description>              <job-class>com.myapplication.reporting.MailJob</job-class>              <group>MailGroup</group>              <durability>false</durability>          </job>            <trigger>              <simple>                  <name>MailTrigger</name>                  <description>Mail dispatcher job trigger, this should be set to run every 1 minute</description>                  <repeat-interval>60000</repeat-interval>                  <group>MailTriggerGroup</group>                  <job-name>MailJob</job-name>                  <job-group>mailGroup</job-group>              </simple>          </trigger>      </schedule>  </job-scheduling-data>    

I am using Quartz 2.2.2