Simple selector question

Simple selector question

Hi

Just started out with jQuery, I'm currently reading Manning

This selector picks the first TR: table#languages tbody tr:nth-child(1), currently with a class wrappedElement.

But when I then try to select the next TR inside the tbody: table#languages tbody tr:nth-child(2), nothing happens.

Can somebody guide me?

Take a look:
<table id="languages" class="" cellspacing="1" border="0">
<thead class="">
</thead>
<tbody class="">
<tr class="wrappedElement">
<td class="">Java</td>
<td class="">Static</td>
<td class="">1995</td>
</tr>
<tr class="">
<td class="">Ruby</td>
<td class="">Dynamic</td>
<td class="">1993</td>
</tr>
<tr class="">
<td class="">Smalltalk</td>
<td class="">Dynamic</td>
<td class="">1972</td>
</tr>
<tr class="">
<td class="">C++</td>
<td class="">Static</td>
<td class="">1983</td>
</tr>
</tbody>
</table>