No need to use plugins when it is a totally custom page (as is your case). Perhaps post the code for your page here and we can see what is wrong.
If you look at the page source, you'll see this:
HTML Code:
<td class='alt1'><?php echo "plop"; ?></td>
So, we can see you tried to do something, but if you put that in a template, that is exactly what will happen since you can't put php in a template. You must put php in the php page.