Due to a recent Facebook change, you'll need to log into Facebook as a personal profile rather than a business. Please use the following steps:
Go to facebook.com and log in as your business if you're not already.
On Facebook, go to Settings, and then Page Roles.
Ensure that your personal Facebook profile is an Admin for your Business Page.
If it is not, invite your Facebook profile to be an Admin.
Log out of Facebook and now log back into Facebook as your personal profile.
Accept the invitation to become an Admin for your business.
Now, in Ecamm Live, click the blue Login button and log into your personal Facebook account.
Pick your business from the Post as menu.