easydiscuss not working

easydiscuss when I click on ask a question I get error message below



1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-2' at line 1 SQL=SELECT DATEDIFF('2015-06-29 20:54:53', a.`created`) as `noofdays`, DATEDIFF('2015-06-29 20:54:53', a.`created`) as `daydiff`, TIMEDIFF('2015-06-29 20:54:53', a.`created`) as `timediff`, a.`id`, a.`title`, a.`alias`, a.`created`, a.`modified`, a.`replied`, a.`legacy`, a.`content`, a.`category_id`, a.`published`, a.`ordering`, a.`vote`, a.`hits`, a.`islock`, a.`featured`, a.`isresolve`, a.`isreport`, a.`user_id`, a.`parent_id`, a.`user_type`, a.`poster_name`, a.`poster_email`, a.`num_likes`, a.`num_negvote`, a.`sum_totalvote`,a.`answered`, a.`post_status`, a.`post_type`, pt.`title` AS `post_type_title`,pt.`suffix` AS `post_type_suffix`, count(b.id) as `num_replies`, c.`title` AS `category`, a.`password` FROM `j0u75_discuss_posts` AS a LEFT JOIN `j0u75_discuss_posts` AS b ON a.`id` = b.`parent_id` AND b.`published` = 1 LEFT JOIN `j0u75_discuss_category` AS c ON a.`category_id` = c.`id` LEFT JOIN `j0u75_discuss_post_types` AS pt ON a.`post_type` = pt.`alias` WHERE a.`published` = '1' AND a.`user_id`='684' AND a.`parent_id` = 0 GROUP BY (a.id) ORDER BY a.`created` DESC LIMIT 0,-2


I have easysocial, easyblog, easydiscuss and k2