ObjectDatastore.load() returns null

[powwow]

I can't seem to figure this out.  What I am trying to do is very trivial and it doesn't load.

Here are my data classes:

public class Screencap {

@Id public Long id;

public String blobkey;

@Activate(0) @Child public List<LinkData> linkDataList;

}

public class LinkData {

@Id public Long id;

@Activate(0) @Parent public Screencap screencap;

public String txt;

@Index public Date dateCreated;

}

This works and I get the right object:

  ObjectDatastore datastore = OD.get();

  return datastore.load(Screencap.class, screencapId);

However, this returns null!

  ObjectDatastore datastore = OD.get();

  return datastore.load(LinkData.class, linkDataId);  //There is indeed a LinkData row with an id in the GAE datastore but it returns null!

What am I doing wrong?  Also this code below work fine:

  ObjectDatastore datastore = OD.get();

  Screencap screencap = datastore.load(Screencap.class, screencapId);

  List<LinkData> linkDataItems = datastore.find()

.type(LinkData.class)

.ancestor(screencap)

.addSort("dateCreated", SortDirection.DESCENDING)

.returnAll()

.now();

[powwow]

Ok, it took me two days to figure it out. :P  Here it is:

LinkData linkData = datastore.load().type(LinkData.class).id(linkDataId).parent(screencap).now();