Chat Still Disabled in Facebook

I'm trying to get some help for my friend whose Chat has been disabled for a couple of weeks. This has nothing to do with Facebook's temporary hold on Chat. Her FB page still says "Chat Disabled on this Page." I've done everything I know to help her, and of course she's getting nowhere trying to get an answer from Facebook. This is an older person who has not done anything to violate Facebook's rules (could that be an issue?) - why would this happen, and how can she get Chat back? Thank you very much.

Please make sure she's using [You must be registered and logged in to see this link.] and not [You must be registered and logged in to see this link.] at the beginning of her URL.

Also, does this Chat page work for her?

[You must be registered and logged in to see this link.]

Thank you so much but here is what she says in reply to your suggestion:
"I can't get on with just http and I can't get on that chat page."
Do you have any other ideas?

That's strange... could you please ask her to take a [You must be registered and logged in to see this link.] of the error message she gets, and to try using a different browser? Chat doesn't work properly on old browsers, such as Internet Explorer 5/6/7 or Netscape.

I will, thank you. What's odd is that Chat worked great for her until recently, and she hasn't switched browsers.