The documentation says that the following shoulw render a textarea, once the page is loaded in the browser:

<tr VALIGN=TOP> 
<td class="label">Message:</td>
<td class="field"><asp:textbox ID="Message" runat="server" Columns="60" Rows="5"></asp:textbox></td>
</tr>

It does not in my case. This control is converted into an INPUT.

Anyone would know what is wrong in this syntax?