C# Rest webservice not deserializing xml correct?

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C#

XML

REST

XmlSerializer

I have created a rest service and it is working perfectly with my get operation, but i am trying to implement a POST, but when the xml data reaches the service it looks like this (missing half the objects and priority changes to 0 instead of 8888) :

<?xml version="1.0" encoding="utf-8"?>
<DVBAlertDetails xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <SessionID>9999</SessionID>
  <Priority>0</Priority>
</DVBAlertDetails>

and the class just has the dvbtriple and error as null

my code is as follows :

Call :

[OperationContract]
[WebInvoke(Method = "POST",
ResponseFormat = WebMessageFormat.Xml,
RequestFormat = WebMessageFormat.Xml,
BodyStyle = WebMessageBodyStyle.Bare,
UriTemplate = "DVBAlert")]
DVBAlertResponse DVBAlert(DVBAlertDetails AlertDetails);

Classes :

[DataContract(Namespace = "")]
public class DVBTriple
{
    [DataMember]
    public int NetworkId { get; set; }

    [DataMember]
    public int ServiceId { get; set; }

    [DataMember]
    public int TransponderId { get; set; }
}

[DataContract(Namespace = "")]
public class Error
{
    [DataMember]
    public string ErrorType { get; set; }

    [DataMember]
    public string ErrorDescription { get; set; }
}

[DataContract(Namespace = "")]
public class DVBAlertDetails
{
    [DataMember]
    public int SessionID { get; set; }

    [DataMember]
    public DVBTriple DVBTriple { get; set; }

    [DataMember]
    public int Priority { get; set; }

    [DataMember]
    public List<Error> Errors { get; set; }
}

XMl Being posted :

<DVBAlertDetails xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <SessionID>9999</SessionID>
  <DVBTriple>
    <NetworkId>3</NetworkId>
    <ServiceId>4</ServiceId>
    <TransponderId>5</TransponderId>
  </DVBTriple>
  <Priority>8888</Priority>
  <Errors>
    <Error>
      <ErrorType>Type</ErrorType>
      <ErrorDescription>Descr</ErrorDescription>
    </Error>
  </Errors>
</DVBAlertDetails>

Any help would be apreciated