Magento veresion 22.214.171.124 and patch SUPEE-6788 both introduce a new security featuer to Magento. Blocks on the front-end have to be enabled or whitelisted before it will work.
Blocks can be added via a new Admin Panel section under Permissions > Blocks. Adding or allowing a new block is pretty streight forward:
System > Permissions > Blocks
Warning: Your browser is very out-of-date. You should upgrade to a better browser.