Menu gauche : pas de lien

Bonjour,
je suis entrain de créer un module.
J’aimerai faire un menu à gauche mais le menu est grisé et les liens ne sont pas cliquables.

		// Main menu entries
        $this->menu[$r]=array(
            'fk_menu'=>'fk_mainmenu=products',			// Put 0 if this is a top menu
        	'type'=> 'left',			// This is a Top menu entry
        	'titre'=> $langs->trans('Prestations'),
        	'mainmenu'=> 'products',
        	'leftmenu'=> 'prestation',		// Use 1 if you also want to add left menu entries using this descriptor. Use 0 if left menu entries are defined in a file pre.inc.php (old school).
			'url'=> '/prestation/prestation.php',
			'langs'=> 'prestation',	// Lang file to use (without .lang) by module. File must be in langs/code_CODE/ directory.
			'position'=> 100,
			'enabled'=> '1',			// Define condition to show or hide menu entry. Use '$conf->mymodule->enabled' if entry must be visible if module is enabled.
			'perms'=> '$user->rights->prestation->allactions->read || $user->rights->prestation->myactions->read',			// Use 'perms'=>'$user->rights->mymodule->level1->level2' if you want your menu with a permission rules
			'target'=> '',
			'user'=> 2	// 0=Menu for internal users, 1=external users, 2=both
        );


        $r++;
        $this->menu[$r]=array(
            'fk_menu'=>'fk_mainmenu=products,fk_leftmenu=prestation',			// Put 0 if this is a top menu
        	'type'=> 'left',			// This is a Top menu entry
        	'titre'=> $langs->trans('NewService'),
        	'mainmenu'=> '',
        	'leftmenu'=> '',		// Use 1 if you also want to add left menu entries using this descriptor. Use 0 if left menu entries are defined in a file pre.inc.php (old school).
			'url'=> '/prestation/prestation.php?action=create',
			'langs'=> 'prestation',	// Lang file to use (without .lang) by module. File must be in langs/code_CODE/ directory.
			'position'=> 101,
			'enabled'=> '1',			// Define condition to show or hide menu entry. Use '$conf->mymodule->enabled' if entry must be visible if module is enabled.
			'perms'=> '$user->rights->prestation->allactions->create || $user->rights->prestation->myactions->create',			// Use 'perms'=>'$user->rights->mymodule->level1->level2' if you want your menu with a permission rules
			'target'=> '',
			'user'=> 2
        );

        $r++;
        $this->menu[$r]=array(
            'fk_menu'=>'fk_mainmenu=products,fk_leftmenu=prestation',			// Put 0 if this is a top menu
        	'type'=> 'left',			// This is a Top menu entry
        	'titre'=> $langs->trans('List'),
        	'mainmenu'=> '',
        	'leftmenu'=> '',		// Use 1 if you also want to add left menu entries using this descriptor. Use 0 if left menu entries are defined in a file pre.inc.php (old school).
			'url'=> '/prestation/prestation.php?filter=unpaid',
			'langs'=> 'prestation',	// Lang file to use (without .lang) by module. File must be in langs/code_CODE/ directory.
			'position'=> 102,
			'enabled'=> '1',			// Define condition to show or hide menu entry. Use '$conf->mymodule->enabled' if entry must be visible if module is enabled.
			'perms'=> '$user->rights->prestation->allactions->read || $user->rights->prestation->myactions->read',			// Use 'perms'=>'$user->rights->mymodule->level1->level2' if you want your menu with a permission rules
			'target'=> '',
			'user'=> 2
        );

        $r++;
        $this->menu[$r]=array(
            'fk_menu'=>'fk_mainmenu=products,fk_leftmenu=prestation',			// Put 0 if this is a top menu
        	'type'=> 'left',			// This is a Top menu entry
        	'titre'=> $langs->trans('Statistics'),
        	'mainmenu'=> '',
        	'leftmenu'=> '',		// Use 1 if you also want to add left menu entries using this descriptor. Use 0 if left menu entries are defined in a file pre.inc.php (old school).
			'url'=> '/prestation/payment.php',
			'langs'=> 'prestation',	// Lang file to use (without .lang) by module. File must be in langs/code_CODE/ directory.
			'position'=> 103,
			'enabled'=> '1',			// Define condition to show or hide menu entry. Use '$conf->mymodule->enabled' if entry must be visible if module is enabled.
			'perms'=> '$user->rights->prestation->allactions->payment || $user->rights->prestation->myactions->payment',			// Use 'perms'=>'$user->rights->mymodule->level1->level2' if you want your menu with a permission rules
			'target'=> '',
			'user'=> 2
        );