A Database Error Occurred

Error Number: 145

Table './c1new2hot/classifieds' is marked as crashed and should be repaired

SELECT c.*,FLOOR((UNIX_TIMESTAMP(NOW()) - UNIX_TIMESTAMP(c.date_posted))/(60*60)) as hoursAgo,UNIX_TIMESTAMP(c.date_posted) as date_posted,UNIX_TIMESTAMP(c.date_updated) as date_updated,0=c.uid as myAd, IF(u.usernamep IS NULL OR u.usernamep='',u.username,u.usernamep) as username, u.userType FROM classifieds c LEFT JOIN users u ON c.uid=u.id WHERE c.id=7798707