Helen,
There are many of us that would be happy to help, but we'll need more information. The only place I can recall seeing this message is in the facebook app. But without knowing even what phone you have (I can only assume it is a Windows Phone since you are here), or what app you see this message in, we'd only be guessing, which wouldn't be very helpful. Tell us as much as you can about the problem, and we'll see what we can come up with.