Magento

Hi
I am new in magento . My magento version is 1.7 . I am using http://templates-master.com/free-absolute-magento-theme.html this theme . There is a default slogan in the banner . (see attachment) . I can’t change this . I have found that this text is in header.phtm file .
Iike this

<h5 class="slogan"><?php echo $this->__('best free magento theme') ?></h5>

Though I have changed the text , but it didn’t work . the slogan remain unchanged . How can I change it.

Click thumbnail to see full-size image

Have you flushed the cache?

yes , I did

but nothing change :(