I have a web page that refreshes every 5 minutes. There are 80 people logged into the page. In the background, once every 5 minutes, some php code scrapes information off another web page, and writes it to a Access database. I have checked to make sure all my database connections are being closed. Can someone speculate on what could be causing the "Service Unavailable" error? When users experience it, they hit the refresh button on their browser, and the page appears?!