Originally Posted by shnoogies

*Nods Head* Agrees with Andrew.WA

ISP lease IP and it is suppose to get release and renew, but thats usually don't happen when expired cos they're trying to save IP Addresses.
Anyways, you can call and tell them of your prob (don't let them off the phone till you test it ) and they usually can reset it from their end and issue you a new IP

Good luck and welcome to AC/ DC