solved!
I removed follows lines (file index.php)
<?php if($s5_pos_logo == "published") { ?>
<div id="s5_logo_module">
<?php s5_module_call('logo','notitle'); ?>
</div>
<?php } else { ?>
<img alt="logo" src="<?php echo $s5_directory_path ?>/images/s5_logo.png" id="s5_logo" onclick="window.document.location.href='<?php echo $LiveSiteUrl ?>'" />
<?php } ?>