BindingManagerBase.CancelCurrentEdit() problem

[johnb41]

I have a simple form with textboxes displaying records from a dataset.

To Add a record, i simply do this (successfully):
' bmb variable holds the me.bindingcontext(dataset, "table"), which
returns a BindingManagerBase object

Private Sub btnAdd_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles btnAdd.Click
bmb.AddNew()
bmb.EndCurrentEdit()
End Sub

But what if the user wants to cancel and NOT add a record. I tried
this unsuccessfully:

Private Sub btnCancel_Click(ByVal sender As System.Object, ByVal e
As System.EventArgs) Handles btnCancel.Click
bmb.CancelCurrentEdit()
End Sub

You'd think that it would remove all the blank entries from the form
and return me to where I was before clicking the "Add" button.
Instead, the button appears to do nothing at all.

Can anyone tell me what i'm missing? I know i'm missing something very
simple!

Thanks!!

John