09-02-2008, 12:34 AM
Tell AMEX that it just now stopped working. You have to report the failure within 10 days or so (read the conditions of the extended warranty). If you inform them that it failed a month ago, and you have been trying to contact the manufacturer since then, they will deny the claim. Just report the failure to them and ask them what to do. I've found them easy to deal with but I was denied a claim once for failing to report the failure promptly.