magento multiselect product attribute not showing option labels on frontend -

i have checked lot , tried many things, still not getting product multiselect selected values label on product view page.

i have product attribute called package multiselect, code create product attribute

$this->addattribute(     'catalog_product',     'package',     array(         'group'             => 'package',         'backend'           => 'eav/entity_attribute_backend_array',         'frontend'          => '',         'class'             => '',         'default'           => '',         'label'             => 'package',         'input'             => 'multiselect',         'type'              => 'text',         'source'            => 'npm_recurrex/package_source',         'global'            => mage_catalog_model_resource_eav_attribute::scope_global,         'is_visible'        => 1,         'required'          => 0,         'searchable'        => 0,         'filterable'        => 0,         'unique'            => 0,         'comparable'        => 0,         'visible_on_front'  => 0,         'user_defined'      => 1,     ) ); 

this works fine, saving product. in frontend product view page when say

mage::log(print_r($_product->getdata('package'), true)); 

its prints result 1,2 wanted display option labels of multiselect not option id's. tried code

mage::log(print_r($_product->getattributetext('package'), true)); 

it prints nothing, blank space :(.

i have checked link no use.

i confused this, wrong? , wrong thing?

can explain me happening in case?

if need show drop down or multiple select value of attribute product should this:

$attributes = $_product->getattributes();  $customattributevalue = $attributes['custom_attribute']->getfrontend()->getvalue($_product);  mage::log($customattributevalue);