Urgent help with repeater!!!!

[MrNorth]

I have apage where the user selects two dates, and then a repeater is showing price information depending on the date interval(discounts etc) My problem is that the repeater isn't filled with new values when a postback occurs, here is my code:

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        If Not Page.IsPostBack Then
                FillUI()
        Else
                 RenderOrderLineRep()
        End If
 
    End Sub
 
 
 
Public Sub RenderOrderLineRep()
        Dim oOrder As New COrder
        repOrderRows.DataSource = oOrder.GetOrderLineItemsByOrderId("1")
        repOrderRows.DataBind()
        oOrder = Nothing
    End Sub

The FillUI() is a method that fills abunch of labels.. and calls the RenderOrderLineRep which is binding the control with the data


On the calendar control I ahve the following code when the user is selecting a date (tried first with a button to post the page, but for the information in the repeater to update I had to click TWICE)

Private Sub calFromDate_SelectionChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles calFromDate.SelectionChanged
        lblFromDate.Text = calFromDate.SelectedDate.ToShortDateString
        calFromDate.Visible = False
        imgFromDate.Visible = True
        Dim oOrder As New COrder
        oOrder.SetAllOrderLinePrices("1", DateDiff(DateInterval.Day, CDate(lblFromDate.Text), CDate(lblToDate.Text)))
        'oOrder = Nothing
    End Sub

As I understand it, when the user select a date, the new prices in updated into the database using oOrder.SetAllOrderLinePrices (I have checked in the database, and it works)
and then the page does a postback, and RenderOrderLineRep() is binding the new data to the repeater...

But why isn't this working? If I did the updating in a submit button instead of on date selection I had to press the button twice to see price changes in repeater, even that the db was updated on the first click.

Am I forgetting to close or flush or commit something??? This is getting on my nerves...

help, quickly please

kind regards
henrik