Unable to find control id 'ID of your Meter' referenced by the 'ControlToValidate' property of 'IDofyourMeterRequird'
<p>I have this error when I run the <code>register.aspx</code> in Visual Studio after I added some fields.  The fields are <code>id</code>, <code>meter</code>, and <code>address</code>.</p>

<p>This is the code:</p>

<pre><code>&lt;tr&gt;
    &lt;td align="right"&gt;
        &lt;asp:Label ID="Label1" runat="server" AssociatedControlID="ID of your Meter"&gt;ID of your Meter:&lt;/asp:Label&gt;
    &lt;/td&gt;
    &lt;td&gt;
        &lt;asp:TextBox ID="TextBox1" runat="server"&gt;&lt;/asp:TextBox&gt;
        &lt;asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="ID of your Meter" ErrorMessage="ID is required." ToolTip="ID is required." ValidationGroup="RegisterUser"&gt;*&lt;/asp:RequiredFieldValidator&gt;
    &lt;/td&gt;
&lt;/tr&gt;
</code></pre>
