Hello gigperfect !

getAll isn't a static method. So you need to change your code like

$aResults = BxDolDb::getInstance()->getAll();

BTW - for the cases with unique indexes you'd better use the getRow method. And better don't use the direct variables in the query:

$aRow = BxDolDb::getInstance()->getRow("SELECT lot_id, user_id FROM final_folly.bx_messenger_jots WHERE user_id = :id", array(

'id' => $iId) );