Those codes you tried are from the example theme. You have to go into your page.php template and dig out the div codes. Looking at the Pinboard theme, it should go something like this: (Please note, I have not tested this)
Wrapper Start HTML:
<div id="container">
<div class="entry">
<div class="entry-content">
Wrapper End HTML:
</div>
</div>
</div>