Order if installed in subfolder

If wordpress is installed in a subfolder and you use mod_rewrite to hide the folder, order doesn’t work (error 404 on ajax requests).

Example:
Wordpress url: http://www.site.com/wp
Site url: http://www.site.com

Need to change row 326 in nivoslider4wp-panel.php from

url: '<?php bloginfo('url'); ?>/wp-admin/admin.php?page=nivo-slider-for-wordpress/nivoslider4wp.php',

to

url: '<?php bloginfo('wpurl'); ?>/wp-admin/admin.php?page=nivo-slider-for-wordpress/nivoslider4wp.php',

http://ww.wp.xz.cn/extend/plugins/nivo-slider-for-wordpress/