magento products are not showing on home page after upgrade from 1.7.2 to 1.9.2 -

i have upgraded magento version,followed following link. https://magento.stackexchange.com/questions/21761/magento-upgrade-from-1-7-to-1-9. know php new magento

find out how products inserted home page. if site use blocks in cms page, this

{{block type="xxx/yyyy" name="" template=""}} 

you should enable usage of block type in

system-> permissions -> blocks