Using Callback to update DB records

I'm using the lastest trial software. I downloaded it today. Im trying to do a update of an appointment record.

I have followed the instructions on the website about calling the eventMove handler. The calendar doesnt update. I can even make a msgbox("hello") appear on event from callback.

Protected Sub DayPilotCalendar1_EventMove(ByVal sender As Object, ByVal e As DayPilot.Web.Ui.Events.EventMoveEventArgs) 

Dim appointmentAdapter As New OhperaBusinessLogicTableAdapters.tblAppointmentsTableAdapter 

'dim variables 
Dim uidApp As Guid 
Dim dtmStart, dtmEnd, dtmAppDate As Date 
Dim strDetails As String 

 uidApp = ConvertStringToGUID(e.Value) 
 dtmStart = e.NewStart 
 dtmEnd = e.NewEnd 
 dtmAppDate = e.NewStart 
 strDetails = e.Text 

appointmentAdapter.Update(uidApp, dtmAppDate, strDetails, dtmStart, dtmEnd) 

DayPilotCalendar1.DataBind() 
DayPilotCalendar1.Update() 


End Sub

html:

<DayPilot:DayPilotCalendar 
          ID="DayPilotCalendar1" 
          runat="server" 
          BackColor="#FFFFD5" 
          BorderColor="#000000" 
          CellSelectColor="#316AC5" 
          DataEndField="dtmEnd" 
          DataSourceID="ObjectDataSource1" 
          DataStartField="dtmStart" 
          DataTextField="strShortDetails" 
          DataValueField="uidAppointment" 
          Days="7" 
          DurationBarColor="Blue" 
          StartDate="2007-09-21" 
          EventMoveHandling = "PostBack" 

> 

</DayPilot:DayPilotCalendar>