my block's title cant display

My site is http://www.b9527.net, I use the bluemarine theme just modified style.css. I found that the block's title cant display since I setup the bluemarine theme with phptemplete engine.

the block.tpl.php's content is:

<div class="block block-<?php print $block->module; ?>" id="block-<?php print $block->module; ?>-<?php print $block->delta; ?>">
    <h2 class="title"><?php print $block->title; ?></h2>
   <div class="content"><?php print $block->content; ?></div>
 </div>

the code:
"<h2 class="title"><?php print $block->title; ?></h2>"do nothing! why?

thanks man!