Enable Designer in PHPMyAdmin

Open the file libraries/config.default.php. Change the following lines of code:

$cfg['Servers'][$i]['pmadb'] = '';
$cfg['Servers'][$i]['bookmarktable'] = '';
$cfg['Servers'][$i]['relation'] = '';
$cfg['Servers'][$i]['table_info'] = '';
$cfg['Servers'][$i]['table_coords'] = '';
$cfg['Servers'][$i]['pdf_pages'] = '';
$cfg['Servers'][$i]['column_info'] = '';
$cfg['Servers'][$i]['history'] = '';
$cfg['Servers'][$i]['designer_coords'] = '';

to

$cfg['Servers'][$i]['pmadb'] = 'phpmyadmin';
$cfg['Servers'][$i]['bookmarktable'] = 'pma_bookmark';
$cfg['Servers'][$i]['relation'] = 'pma_relation';
$cfg['Servers'][$i]['table_info'] = 'pma_table_info';
$cfg['Servers'][$i]['table_coords'] = 'pma_table_coords';
$cfg['Servers'][$i]['pdf_pages'] = 'pma_pdf_pages';
$cfg['Servers'][$i]['column_info'] = 'pma_column_info';
$cfg['Servers'][$i]['history'] = 'pma_history';
$cfg['Servers'][$i]['designer_coords'] = 'pma_designer_coords';

Also, Create DB name phpmyadmin and run the script in your wamp/apps/phpmyadmin3.3.9/scripts/create_tables.sql