Forum Database error upgrading from 4.0.2 to 4.0.3 - URGENT

[محروم.كوم]

Hi dudes, pls, I need help

I´m upgrading from 4.0.2 to 4.0.3 and I get the following error on

http://www.mydomain.com/install/upgrade_403.php?step=1

Step 1) Misc Table Alterations

• Altering attachment Table (1 of 1)
• Updating attachment table
• Altering templatehistory Table (1 of 1)

Database error in vBulletin 4.0.2:

Invalid SQL:
ALTER TABLE templatehistory CHANGE styleid styleid SMALLINT NOT NULL DEFAULT '0';

MySQL Error : Error writing file './my-database-name/#sql-78f0_53270.frm' (Errcode: 28)
Error Number : 3
Request Date : Wednesday, April 14th 2010 @ 1252 PM
Error Date : Wednesday, April 14th 2010 @ 1252 PM
Script : http://www.mydomain.com/install/upgrade_403.php?step=1
Referrer : http://www.mydomain.com/install/upgrade_403.php
IP Address : 200.186.153.225
Username :
Classname : vB_Database

MySQL Version : 5.0.90-community


I can't even get access to the admincp, the forum is turned off.

Can you please give me some help? __DEFINE_LIKE_SHARE__