Patch has error trying to upgrade from 3.5 to 4

[silverstripe]

In the absense of information (please let me know where too look!), I downloaded http://www.sugarforge.org/frs/downlo...atch-4.0.0.zip and unzipped over the top of my existing installation (3.5), and then visited http://<sugarcrm url>/upgrade/

This produced the message:

Fatal error: Call to a member function on a non-object in /sites/crm.totallydigital.co.nz/include/database/PearDatabase.php on line 204

This appears to be within the function query($sql, $dieOnError=false, $msg='', $suppress=false), the actual line being:

$GLOBALS['log']->info('Query:' . $sql);

That not working, I tried visiting http://crm/upgrade/3.5.0_to_3.5.0a.php but that had the same problem.

Is this the correct way to perform the upgrade?
Is it obvious what is wrong and what should I do?

As a suggestion, the README file in the root of the zip file ought to contain how to perform the upgrade. Even if it is simply to visit a URL (sugarcrm.com/something) or visit a PHP file (e.g. /upgrade/index.php of this zip file)

[silverstripe]

I didn't realise that you installed patches by uploading them into the wizard ... All sorted now.