Can't post question..general error

Everytime I try to post a question I get this message after trying to submit it.Did I do something wrong?
Could not insert new word matches


SQL Error : 1016 Can’t open file: ‘phpbb_search_wordmatch.MYI’ (errno: 145)

INSERT INTO phpbb_search_wordmatch (post_id, word_id, title_match) SELECT 393561, word_id, 0 FROM phpbb_search_wordlist WHERE word_text IN (‘sorry’, ‘one’, ‘trying’, ‘knit’, ‘hat’, ‘color’, ‘changes’, ‘slowing’, ‘easier’, ‘work’, ‘besides’, ‘doing’, ‘pattern’, ‘knitting’, ‘circular’, ‘needles’, ‘helps’, ‘tried’, ‘looks’, ‘hard’, ‘tell’, ‘holding’, ‘yarns’, ‘help’, ‘thanks’)

Line : 251
File : /home/knittinghelp/public_html/knitting/forum/includes/functions_search.php