Top toolbar is not showing in wordpress admin panel

I’ve a solution of my problem. I used chrome developer tool to find out the differences between the sites in my server and in my localhost. While inspecting the source I found following error-

<div class="inside">
<br>
<b>Fatal error</b>:  Out of memory (allocated 43778048) (tried to allocate 132605 bytes) in <b>/home/easyitca/public_html/samples/movierez/wp-includes/wp-db.php</b> on line <b>787</b><br>
</div>

and then i googled for the memory allocation problem. Then I added following in my wp-config.php file as suggested-

define('WP_MEMORY_LIMIT', '64M');

but still it was saying same problem. And then I increased the memory limit from 64M to 128M and it worked!

define('WP_MEMORY_LIMIT', '128M');