Our apologies: We cannot determine the recipient. Possibly the web page referencing this service isn't one supported by this service. The problem has been logged so it should come to our attention. You'll have to try reaching the person by other means.
This problem can arise if you have software disabling 'referers' (for example, Norton Internet Security). Such utilities can usually be temporarily disabled or permanently configured to allow access to specific sites (this site is 'www.ncf.ca').