Carter,

I took a look at the code in your page, and the problem is that you need to set the DataSet as the business object's "current" DataSet before you delete.

Here's the code:

DataSet dstEvents = (DataSet)Session["dstEvents"];
this.otEvents.SetCurrentDataSet(dstEvents);
this.otEvents.Delete();
Response.Redirect(this.sListPage);

Previously, when you were calling the Delete method, passing the DataSet in, the DataSet does not automatically get set as the business object's current DataSet (by design). So when you the UI controls try to bind to the business object, you get an error because the business object has no data.

The same is true of your Save button event handler:

DataSet dstEvents = (DataSet)Session["dstEvents"];
this.otEvents.SetCurrentDataSet(dstEvents);
this.otEvents.NewRow();
OakLeaf.MM.Main.Business.mmSaveDataResult result = this.otEvents.SaveDataSet(dstEvents);
if (result == OakLeaf.MM.Main.Business.mmSaveDataResult.RulesPassed)
{
	Response.Redirect(this.sListPage);
}

Regards,