Good afternoon,
I found that I also needed to copy the changes back into the original dt datatable. Here's the code.
protected override bool HookPreSave(DataTable dt)
{
System.Data.DataTable dtchanged = dt.GetChanges();
foreach (DataRow dr in dtchanged.Rows)
{
dr["EdtDTime"] = DateTime.Now;
}
dt.Merge(dtchanged);
return true;
}

rick