Don't know what to say. I have no trouble logging on to OOF but I've been registered since 2007. Try this other Brit Omega site.

Vauxhall Owners Network:
http://www.vauxhallownersnetwork.co....ners-forum.29/

There's also a Catera forum on Yahoo:
http://groups.yahoo.com/neo/groups/CateraOwners/info