WordPress database error: [Got error -1 from table handler]

Hi. Suddenly all my posts on the front page have gone, on top I get this error:

WordPress database error: [Got error -1 from table handler]
SELECT DISTINCT * FROM wp_posts WHERE 1=1 AND post_date_gmt <= ‘2005-07-22 03:42:59’ AND (post_status = “publish” OR post_author = 1 AND post_status != ‘draft’ AND post_status != ‘static’) GROUP BY wp_posts.ID ORDER BY post_date DESC LIMIT 0, 50

Any ideas on how to fix this? Thanks a lot

(you can see the error on: http://www.alt1040.com)