Please help about cache error

Hi,

Could someone help me ..

I'm using ...
Joomla 1.0.12
SMF 1.1.1
Joomla smf 2.0.2
PHP 4.4.0
CB ?? sorry I don't know what is this?
phpMyAdmin 2.6.4-pl2

When I'm going to save something on SMF the page can't be loaded then it shows something like page error which I have to wait about 1-2 minute, then it can work again.

I got error more than hundred a day in the SMF log error

Quote

8: Only variable references should be returned by reference
File: /includes/joomla.php
Line: 364

file joomla.php

Code:

/**
* @return object A function cache object
*/
function &getCache( $group='' ) {
global $mosConfig_absolute_path, $mosConfig_caching, $mosConfig_cachepath, $mosConfig_cachetime;

require_once( $mosConfig_absolute_path . '/includes/joomla.cache.php' );

$options = array(
'cacheDir' => $mosConfig_cachepath . '/',
'caching' => $mosConfig_caching,
'defaultGroup' => $group,
'lifeTime' => $mosConfig_cachetime
);
$cache = new JCache_Lite_Function( $options );
return $cache; // line 364
}

Should I close cache configuration ?
Does joomla-smf bridge require cb_plug_smf_2_0_3.zip ?
I don't have community builder .. this one I have to install first or something ?
Sorry for newbie question ..
Tai