[Plugin: Grand Slider] The plugin will not activate

After successfully installing the plugin I clicked to activate it. And this is the message it gave me. I figured it could have been a conflict with other plugins so I did some deactivating of other plugins. Still no luck. 🙁

Fatal error: Cannot redeclare get_plugin_data() (previously declared in /home/yatgulch/public_html/wp-admin/includes/plugin.php:72) in /home/yatgulch/public_html/wp-content/plugins/grand-slider/plugin-data.php on line 107

If there is a way to fix this I would be very grateful. Thank you in advance.

http://wordpress.org/extend/plugins/grand-slider/