Problema al actualizar

bueno quiero actualizar de la version 3.5.0 rc1 a la 3.5.1 y bueno subo todos los archivos de la carpeta upload y los sobreescribo por los que ya estan... configuro otra ves el config.php y bueno voy a la carpeta /install/install.php hasta ahi todo bien hasta q aparece esto

This script will update your vBulletin installation to version 3.5.0 Release Candidate 2
Press the 'Next Step' button to proceed.

pongo next step y aparece esto....



Step 1) Updating product fields

* Altering phrasetype Table (1 of 1)
* Altering phrase Table (1 of 1)
* Altering template Table (1 of 1)
* Altering setting Table (1 of 1)
* Altering settinggroup Table (1 of 1)
* Altering adminhelp Table (1 of 1)
* Altering plugin Table (1 of 1)

There seems to have been a problem with the Warexone Foros database.
Please try again by clicking the Refresh button in your web browser.

An E-Mail has been dispatched to our Technical Staff, whom you can also contact if the problem persists.

We apologise for any inconvenience.


Database error in vBulletin 3.5.0 Release Candidate 1:

Invalid SQL:
ALTER TABLE plugin CHANGE product product VARCHAR(25) NOT NULL DEFAULT '';

MySQL Error : Table 'warexone_foro.plugin' doesn't exist
Error Number : 1146
Date : Thursday, December 1st 2005 @ 01:13:39 AM
Script :
Referrer :
IP Address : 200.55.102.39
Username :
Classname : vb_database



que puedo hacer_? a q se deve esta falla???