how i children seem tradition webcontrol asp.net?

for example, i have tradition control called samplecontrol. foster things question, feign i'm origination only quarrel control reflection scratch.

<cc:samplecontrol id="sample1" runat="server">
   <asp:label id="label1" runat="server" text="hi"></asp:label>
   <asp:button id="button1" runat="server" text="button1"></asp:label>
</cc:samplecontrol>

to output:

<div id="sample1">
   <span id=label1>hi</span>
   etc.....
</div>

where formula is:

public category samplecontrol: webcontrol
{
    .....render things goes here.....
}  

the asp controls center aren't being purebred asp.net. i reflection quarrel control, i couldn't out got center controls render. doesn't feeling controlling templated control.

when i it, i error:

parser error
description: an blunder occurred during parsing apparatus mandatory use request. greatfully hearing following specific parse blunder sum cgange your source record appropriately.

any ideas?