Web server keeps going down

I am running an NT4 web server. The SMTP service & the WWW service keep stopping when the web site gets hit a lot at peak times. I know the reason for the problem & the cure is to upgrade to 2000/2003 but in the meantime i wanted to know if there was any way of the server telling me when the web site is down. These 2 services do not show anything in the event log.