[TYPO3-english] Some classes are removed in RTE.

[Guillermo R. Oramas J.]

Hello.

I paste the code below in the RTE but when I open the page the class of the
table disappears.

    <table class="mov-call-dates">
        <tr>
            <th class="table-top-left">Semestre 2013-2</th>
            <th>Desde</th>
            <th class="table-top-right">Hasta</th>
        </tr>
        <tr>
            <td class="table-title-column">MSI</td>
            <td>30-Nov-2012</td>
            <td>31-Mar-2013</td>
        </tr>
        <tr>
            <td class="table-title-column table-bottom-left">MSN</td>
            <td>30-Nov-2012</td>
            <td class="table-bottom-right">30-Abr-2013</td>
        </tr>
    </table>

What can I do?

Thanks for the help.