Hey dondave72,
There's a few common reasons that this could happen. If you added the [custom-facebook-feed] shortcode to your page but the Facebook feed isn't being displayed then it's usually due to one of the reasons listed in this FAQ. If you're able to send me your 'System Info' from the plugin (which is under the 'Support' tab on the plugin's Settings page) then I can take a look at the settings you're using and let you know the reason.
Many thanks, and I hope you're having a good weekend.
John