If you’ve attempted to embed your Magento store in an iframe recently and it hasn’t loaded, a new setting in Magento 1.9 Community Edition and Magento Enterprise Edition 1.14 may well be the cause: Magento has disabled embedding by iframe by default.
Enabling embedding by iframe for your Magento store
Log in to your store’s administration panel, and navigate to System > Configuration in the menu:
From here, select Admin from the Advanced tabs (in the left-hand column):
Finally, expand the Security settings panel and change the Allow Magento Frontend to run in frame option to Enabled:
You can also use the Allow Magento Backend to run in frame setting to allow Magento’s backend to run in an iframe (not recommended).
If you’d like any help with your Magento store(s), we offer Magento consultancy to clients large and small.