Um... can you give us some description of the environment in which this is happening? What version of Windows? What program is barfing the error? When did the problem start happening?

Ah, OK- that makes things a bit clearer I think. It sounds like the error is actually on the server's side. I'm not going to register with them to see if I can replicate the problem on any of my machines (privacy issues and all that), but does this happen immediately upon you entering your membername and password, or does it happen when you try to go deeper into the site?

See if you can email a description of your problem to the administrator or webmaster of that site. As I said, since you only get the error at their site, I do think it's related to something specific to their database implementation.