I dont know what happened!
I just was i the university the whole day and now I see that error 
Database error in vBulletin 3.0.0 Beta 4:
Invalid SQL:
SELECT forum.forumid, lastpost, lastposter, lastthread, lastthreadid, lasticonid, threadcount, replycount, lastpostid
FROM forum AS forum;
MySQL Error : Unknown column 'lastthread' in 'field list'
Error Number : 1054
Date : Thursday, April 3rd 2008 @ 04:23:00 PM
Script :
http://www.wachos.cl/comunidad/
Referrer :
IP Address : 190.46.40.74
Username : THAROS
Classname : vB_Database
could you help me please??