Vera web server failed - bad device?

My Vera Edge stopped responding to web requests on port 80 and port 3480. But, I can access it from the iPhone app and successfully send commands. I have tried resetting it, but I cannot figure out how to add it to my Z-Wave network this time. I have done it twice successfully, but not now. The Vera is the secondary controller to a Simon XT control panel. I tried restoring from a backup a day or two old, and the web server stopped responding again, but the iPhone app worked. I tried restoring from a week-old backup, and in ping I started getting Destination Host Unreachable messages. Can you help?