Forum Problem upgrading vb from 3.6 to 4.2
 

Hi,
I have a problem in upgrading vb from 3.6 to 4.2.
When the process is upgrading my forum at version 4.0 it display me this error.
Any solutions?

Thank you

Unexpected Text:
Warning: mysql_query(): MySQL server has gone away in C:\DWASFiles\Sites\unibosca\VirtualDirectory0\site \wwwroot\includes\class_core.php on line 417Warning: mysql_query(): Error reading result set's header in C:\DWASFiles\Sites\unibosca\VirtualDirectory0\site \wwwroot\includes\class_core.php on line 417 Creating index threadid_visible_dateline on fo2post An error has occurred with your database. Please contact vBulletin Support for assistance.</p>Module: 400a1, Step 104 Database Error:-1

MySQL server has gone away

Query:

### vBulletin Database Alter ### ALTER TABLE fo2post ADD INDEX threadid_visible_dateline (threadid,visible,dateline,userid,postid)]]> Status: Processing 4.0.0 Alpha 1, Step 104 of 109 4.0.0 Alpha 1 400a1 104