That is correct. Many ticket bought a few years ago were non-expiring. You used to be able to scan and fax the back of your tickets to Guest Services and they could tell you. But they don't do that anymore. The only way to tell is to bring them with you and have them scan the tickets in person.They could be non-expiring. You'll have to wait until you get there to check. The non-expiry option ended in 2007.
We bought them November 2004 so if the non-expiry thing was in 2007 then they should still be valid! Thank you so much for your help. I hope they are and will just have to wait to try at the gate.