Getintothegame writes, "At the moment, nobody can register a new HL or renew a HL on PSO GC's Game Webite. It's due to their own server's fault, if you think it's your browser's fault, it isn't.
SEGA should have it back up soon.
Discuss it here."
Thanks for the info. I did some quick checking and this appears to be a legitimate problem as many people are reporting it even on Sega's own boards. Just be patient. The server should be back up soon. EDIT: supadjxis, site admin for Sega.com has posted that they have issolated the issue and it should be back up ASAP.