transcational custom email is observer not loading image header and footer

Question

my custom transactional email is not loading image for header and footer. i am sending the mail through observer other email are working perfectly only the observer email not loading header and footer properly.

$emailTemplate  = Mage::getModel('core/email_template')
                                ->loadDefault('review_template');                                    
                $emailTemplate->setSenderName(Mage::getStoreConfig('trans_email/ident_general/name'));
                $emailTemplate->setSenderEmail(Mage::getStoreConfig('trans_email/ident_general/email')); 
                $emailTemplate->setTemplateSubject('Make a Review');  
                $email=$order->getCustomerEmail();
                $emailTemplateVariables = array();
                $emailTemplateVariables['test'] = $companyinfo->getCompanyName();
                $emailTemplateVariables['name'] = $order->getCustomerFirstname().' '.$order->getCustomerLastname();
                $emailTemplateVariables['reviewurl'] = Mage::getUrl('test/index/review',array('ref' => $ref));

                $processedTemplate = $emailTemplate->getProcessedTemplate($emailTemplateVariables);
                $emailTemplate->send($email,$order->getCustomerFirstname().' '.$order->getCustomerLastname(), $emailTemplateVariables);

Answer 1

setting the setDesignConfig and area to frontend solved my problem.

$emailTemplate  = Mage::getModel('core/email_template')
                                ->loadDefault('review_template');  
$emailTemplate
                ->setDesignConfig(array('area' => 'frontend', 'store' => $store->getId()));  
            $emailTemplate->send($email,$order->getCustomerFirstname().' '.$order->getCustomerLastname(), $emailTemplateVariables,$storeId=null);