Help: Data base error in 3.8.5

[محروم.كوم]

Hello,

I am using vbulletin 3.8.5 and runing mysql 4.1.25 and FreeBSD 7.3-STABLE, i got a problem when any user wana to post a replay in any theard we got this error:

Database error in vBulletin 3.8.5:
Invalid SQL:
REPLACE INTO postindex
(wordid, postid, score, intitle)
VALUES
(3235, 521711, 1, 0), (484, 521711, 1, 0);
MySQL Error : Table 'postindex' is marked as crashed and should be repaired
Error Number : 1194
Request Date : Sunday, June 20th 2010 @ 0907 PM
Error Date : Sunday, June 20th 2010 @ 0907 PM


MySQL Version : 4.1.25-log


note : i am using Plain freebsd and there is no Phpadmin etc.....

can some one help me ASAP

Thanks __DEFINE_LIKE_SHARE__