I was just curious if anyone can see what may be wrong with the format of my following code. I don't get an error, but nothing happens with the data in the Access Database.

Code:
                Using conn As New OleDbConnection(My.Settings.dcConn)
                    Using update As New OleDbCommand("UPDATE events SET title = @title, event_date = @event_date, time_start = @time_start, time_end = @time_end, location = @location, description = @description WHERE event_id = @event_id", conn)
                        update.Parameters.AddWithValue("@event_id", ep.event_id)
                        MessageBox.Show(ep.event_id)
                        update.Parameters.AddWithValue("@title", txtTitle.Text)
                        update.Parameters.AddWithValue("@event_date", Format(frmEventsManage.Calendar.SelectionRange.Start, "MM/d/yyyy"))
                        update.Parameters.AddWithValue("@time_start", Format(dtpStart.Value, "h:mm tt"))
                        If dtpEnd.Checked = True Then
                            update.Parameters.AddWithValue("@time_end", Format(dtpEnd.Value, "h:mm tt"))
                        ElseIf dtpEnd.Checked = False Then
                            update.Parameters.AddWithValue("@time_end", DBNull.Value)
                        End If
                        update.Parameters.AddWithValue("@location", txtLocation.Text)
                        update.Parameters.AddWithValue("@description", txtDescription.Text)
                        conn.Open()
                        update.ExecuteNonQuery()
                    End Using
                End Using