Make sure you are using the latest version of your web browser and have updated your age and country restrictions for your business page. If this doesn’t resolve the problem, be sure to check if there is another agent who is also an admin on your business page, who has linked their Directory profile to your page. If so, this would prevent you from seeing the page in the drop-down. Also, be sure your business page is published. Once you’ve filled out your Facebook Page and are ready to show it to the public, you need to publish your Page to have it display on the site.
While your Page is unpublished, you’ll see a dialog at the top of your Facebook Page indicating that your Page is not currently visible to non-admins. There is a link there to Publish Your Page. This will instantly set your Facebook Page to published and make it visible to the public. You can also publish your Page from the Edit Page section.