Can not register at Disneyworld.com

[marcus.ka]

I can not register myself at www.disneyworld.com

I can click on register, then I can enter my Birthdate and if I click then on CONTINUE I get the same error message every time:

HTTP Status 500 - java.lang.NullPointerException

I deleted the cache but the problem is the same.
Does that sound familiar to anyone?

I want to register so that I can cancel one of my online reservations and to use the other features of the site as well.