If you share your business page, aka fanpage with a post about your product, it's important that you do two things.
1. Make sure you have RECENT posts on your business page. If someone goes there and the last post was the 19th of December... or November... you haven't even addressed the NEW YEAR on your business page... they will think your business is a hobby - that you don't have follow through.
2. Make sure you are checking your messages from your business page. If you use your cell mainly, you will need to download the page manager to view those.