Problem with DeepCloneObjects and DBText insertion point

[dallion]

Forget all the DeepCloning, I've whittled it down to the DBText.Position point doesn't seem to work as advertised: The text doesn't move to 0,0,0.

 
[CommandMethod("copyEnt")]
public void copyEnt()
{
  Document doc = Application.DocumentManager.MdiActiveDocument;
  Database db = doc.Database;
  Editor ed = doc.Editor;
  PromptEntityOptions options =
  new PromptEntityOptions("\nSelect entity to copy");
  PromptEntityResult acSSPrompt = ed.GetEntity(options);
  if (acSSPrompt.Status != PromptStatus.OK)
     return;
   using (Transaction Tx = db.TransactionManager.StartTransaction())
   {
     DBText oldText = Tx.GetObject(acSSPrompt.ObjectId, OpenMode.ForWrite) as DBText;
     oldText.Position = new Point3d(0,0,0);
     oldText.TextString = "BLAH BLAH";
     Tx.Commit();
}
}

Edited April 5, 2013 by dallion
changing code to runnable example of problem

[dallion]

Never mind, I have figured it out using the GetVectorTo() method. Not sure why just changing the writable property doesn't work?