Can't seem to get RequiredFieldValidator in nested user control to fire
<p>I have a user control (form) inside a user control (grid) with a Validator in the form.  A snippet from the code is below</p>

<pre><code>&lt;asp:tablerow&gt;
    &lt;asp:tablecell HorizontalAlign="center" columnspan="2" &gt;
        &lt;asp:ValidationSummary runat="server" id="ValidationSummary1" /&gt;
    &lt;/asp:tablecell&gt;
&lt;/asp:tablerow&gt;
&lt;asp:tablerow&gt;
    &lt;asp:tablecell HorizontalAlign="left" style="padding-left:250px;" &gt;
        &lt;asp:label ID="Label1" runat="server" Text="Foo:" AssociatedControlId="txtFoo" /&gt;
    &lt;/asp:tablecell&gt;
    &lt;asp:tablecell HorizontalAlign="left" style="padding-right:200px;" &gt;
        &lt;asp:textbox runat="server" id="txtFoo" Text="" /&gt;
        &amp;nbsp
        &lt;asp:RequiredFieldValidator 
                            ID="RequiredFieldValidator1" 
                            runat="server" 
                            ErrorMessage="Foo is a Required Field" 
                            Text="*" 
                            ControlToValidate="txtFoo" /&gt;
    &lt;/asp:tablecell&gt;
&lt;/asp:tablerow&gt;
</code></pre>

<p>This code is identical to code in another user control where the parent is not a user control and that page works fine, but on this page the <code>Validator</code> doesn't fire and the <code>Foo_ItemCommand</code> method fires instead.  I tried searching Google and StackOverFlow but haven't been able to find anything that helps.</p>

<p>Thanks for any assistance you might have.<br>
Dan</p>
