upgrade beta 5 error

[BiMBo3MeNDo]

Any1 can help me??
I have this problem:

Database error in vBulletin 4.0.0 Beta 4:

Invalid SQL:
ALTER TABLE searchcore_text MODIFY title VARCHAR(254) NOT NULL DEFAULT '';

MySQL Error : Table 'Sql225557_2.searchcore_text' doesn't exist
Error Number : 1146
Request Date : Sunday, December 6th 2009 @ 09:24:59 PM
Error Date : Sunday, December 6th 2009 @ 09:25:00 PM
Script : http://***/install/upgrade_400b5.php?step=1
Referrer : http://***/install/upgrade_400b5.php
IP Address : 82.54.122.86
Username :
Classname : vB_Database
MySQL Version : 5.0.82sp1-log

[HMBeaty]

<a href="https://vborg.vbsupport.ru/showthread.php?t=228035" target="_blank">Installation Issues / Questions or bug reports regarding default vBulletin 4.0</a>