json - JSON 解析の問題

Question

以下は、HttpMapRoute "serviceUrl.

<ArrayOfProject>
   <Project>
      <AssignedUserId>5</AssignedUserId>   
      <CreatedByUserId>1</CreatedByUserId>
      <CreatedOnDate>2013-08-15T01:18:37.443</CreatedOnDate>
      <LastModifiedByUserId>1</LastModifiedByUserId>
      <LastModifiedOnDate>2013-08-15T01:24:57.953</LastModifiedOnDate>
      <ProjectDescription>Testing javascript and MVVM with DNN-platform
      </ProjectDescription>
      <ProjectId>1</ProjectId>
      <ProjectName>javascript and DNN</ProjectName>
      <Purpose>For fun</Purpose>
   </Project>
   <Project>
      <AssignedUserId>5</AssignedUserId>   
      <CreatedByUserId>1</CreatedByUserId>
      <CreatedOnDate>2013-08-15T01:18:37.443</CreatedOnDate>
      <LastModifiedByUserId>1</LastModifiedByUserId>
      <LastModifiedOnDate>2013-08-15T01:27:57.419</LastModifiedOnDate>
      <ProjectDescription>DNN Module design in development and Skins
      </ProjectDescription>
      <ProjectId>2</ProjectId>
      <ProjectName>CSS systems in DNN</ProjectName>
   </Project>
</ArrayOfProject>

私のJSON呼び出しは次のとおりです。

self.projectCollection = ko.observableArray([]); 

$.getJSON(serviceUrl, function (allData) {
        var i = 0;
        $.each(allData, self.projectCollection.push(new Project(allData[i++])));
    });

... Project は関数です:

function Project(data) {
    var self = this;

    self.projectname = ko.observable(data.ProjectName);
    self.description = ko.observable(data.ProjectDescription);
    self.assigneduserid = ko.observable(data.AssignedUserId);
    self.createdondate = ko.observable(data.CreatedOnDate);
    self.createdbyuserid = ko.observable(data.CreatedByUserId);
    self.lastmodifiedondate = ko.observable(data.LastModifiedOnDate);
    self.lastmodifiedbyuserid = ko.observable(data.LastModifiedByUserId);
}

「projectColletion」に最初の Project 以外のものが入力されないのはなぜですか?