eval $vbulletin->templatecache not working!

[al3bed]

hi,

I have a problem but I don't know where exactly?

look at the code please

PHP Code:

$ain_adsense_info = $vbulletin->db->query_read("
                    SELECT id, type, content, channel, slot, width, height
                    FROM " . TABLE_PREFIX . "ainadsense AS ainadsense
                    ORDER BY id ASC
                ");
                
                while ($ainadsense = $db->fetch_array($ain_adsense_info))
                {
                    exec_switch_bg();
                    eval('$ain_adsense_bit .= "' . $vbulletin->templatecache['ain_adsense_manager_bit'] . '";');
                } 


the template 'ain_adsense_manager_bit' will take data and show it in home template
but my problem is that $ain_adsense_bit not working inside any template!

and the table is not empty