Every once a while I get this "red exclaimation mark :!: " in my Plesk 7.0.2 saying that "IP address is not present on the interface" and any services running on that particular IP will not be available to the public. I will have to "Repair IP" on all those IPs and the services are up again. Anybody knows what's wrong?

This is a Plesk 7.0.2 running on RHE 3.

This is what I am talking about. Get this every couple days.