Data repeater does not work

For some reason the below data repeater does not work. When using campaign builder, or using this template as a recurring campaign, the items from the RSS feed are not displayed using the repeater. The RSS feed pulls in perfectly in campaign builder (the posts show up in the left column), but when selected do not appear in the preview.

<table>
    <datarepeater type='rss' src=''>
        <tr>
            <td style='vertical-align:middle; padding:20px'>
                <rssitemlink>
                    <rssimage style='max-width:125px'></rssimage>
                </rssitemlink>
            </td>
            <td>
                <h4>
                    <rssitemlink>
                        <b><rsstitle></rsstitle/></b>
                    </rssitemlink>
                </h4>
            </td>
        </tr>
    </datarepeater>
</table>

I'm also using the following tags in the template which may cause the problem because it's not valid HTML?

<h5 class="collapse" style='color: #8A8C92;font-weight: normal;'><currentmonthname> <currentday>, <currentyear></h5>

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