Radgrid visible problem

[Myriam]

Hello
I have a radgrid in my form.
I also have a radiobutton that control if I want to see the radgrid or not

If Me.RBDestination.SelectedValue = 0 Then 'simple
          Me.TrMultiple.Visible = False
      ElseIf Me.RBDestination.SelectedValue = 1 Then 'multiple
          Me.TrMultiple.Visible = True
      End If

My radgrid is in the TrMultiple <tr>
On the page load I do

If Not IsPostBack = True Then
          RBDestination.SelectedValue = 0
          RBDestination_SelectedIndexChanged(Me, EventArgs.Empty)
  End If

 And my RadioButton looks like this:

<asp:RadioButtonList ID="RBDestination" runat="server" BorderColor="Black" BorderWidth="1" AutoPostBack="true">
            <asp:ListItem Value="0">Destination simple</asp:ListItem>
             <asp:ListItem Value="1">Destination multiple</asp:ListItem>
 </asp:RadioButtonList>

and my radgrid:

<tr id="TrMultiple" runat="server" >
       <td></td>
       <td>
              <telerik:RadGrid
                   ID="RadGrid2"
                   Skin="Vista"
                   runat="server"
                   ShowFooter="true"
                  CommandItemStyle-HorizontalAlign="Center" Width="200px">

                   <MasterTableView
                        ShowFooter="true"
                        CommandItemDisplay="bottom"
                        EditMode="InPlace" >
                       <CommandItemTemplate>
                              <asp:LinkButton ID="LinkButton1" CommandName="CalculDistance" Runat="server" CssClass="TexteBlanc16">Calculer</asp:LinkButton>
                       </CommandItemTemplate>
                      <Columns>
                           <telerik:GridTemplateColumn UniqueName="CodePostal" HeaderText="Destinations">
                                 <ItemTemplate>
                                      <asp:DropDownList ID="LstCodePostal" runat="server"></asp:DropDownList>
                                 </ItemTemplate>
                          </telerik:GridTemplateColumn>
                      </Columns>
               </MasterTableView>

     </telerik:RadGrid>

When I click on the radio button to put it visible (value = 1) then I see a little blue line as my radgrid seems to be empty. However, If in my page load I put the radiobutton value to 1, I see my radgrid as It should be..And after that, if I select the value 0 of my radio button and reselect the value 1 to make appear my grid, it shows my grid correctly.
It seems to happens only when I put the radgrid visible to false on page load...
how can i fix it?
Thank you

[Princy]

Hello Myriam,

I tried the following code snippet and it worked on my end.
VB:

protected void Page_Load(object sender, EventArgs e)
{
 If Not (IsPostBack = True) Then
    RBDestination.SelectedValue = "0"
    RBDestination_SelectedIndexChanged(Me, EventArgs.Empty)
 End If
}
protected void RBDestination_SelectedIndexChanged(object sender, EventArgs e)
{
  If RBDestination.SelectedValue.ToString() = "0" Then
    Me.TrMultiple.Visible = False
  ElseIf RBDestination.SelectedValue.ToString() = "1" Then
    Me.TrMultiple.Visible = True
  End If
}

Thanks,
Princy